CVE-2026-48855

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-48855", "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "state": "PUBLISHED", "assignerShortName": "EEF", "dateReserved": "2026-05-25T20:44:10.697Z", "datePublished": "2026-06-10T14:35:49.683Z", "dateUpdated": "2026-09-24T20:35:33.970Z"}, "containers": {"cna": {"affected": [{"cpes": ["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"], "defaultStatus": "unknown", "modules": ["ssh_sftpd"], "packageName": "otp", "packageURL": "pkg:software-id/erlang.org/otp", "product": "OTP", "programFiles": ["lib/ssh/src/ssh_sftpd.erl"], "programRoutines": [{"name": "ssh_sftpd:handle_op/4"}], "vendor": "Erlang", "versions": [{"changes": [{"at": "27.3.4.13", "status": "unaffected"}, {"at": "28.5.0.2", "status": "unaffected"}, {"at": "29.0.2", "status": "unaffected"}], "lessThan": "*", "status": "affected", "version": "17.0", "versionType": "otp"}]}, {"cpes": ["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"], "defaultStatus": "unknown", "modules": ["ssh_sftpd"], "packageName": "ssh", "packageURL": "pkg:otp/ssh?repository_url=https:%2F%2Fgithub.com%2Ferlang%2Fotp&vcs_url=git%2Bhttps:%2F%2Fgithub.com%2Ferlang%2Fotp.git", "product": "OTP", "programFiles": ["src/ssh_sftpd.erl"], "programRoutines": [{"name": "ssh_sftpd:handle_op/4"}], "repo": "https://github.com/erlang/otp", "vendor": "Erlang", "versions": [{"changes": [{"at": "5.2.11.8", "status": "unaffected"}, {"at": "5.5.2.1", "status": "unaffected"}, {"at": "6.0.1", "status": "unaffected"}], "lessThan": "*", "status": "affected", "version": "3.0.1", "versionType": "otp"}]}, {"collectionURL": "https://github.com", "cpes": ["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"], "defaultStatus": "unknown", "modules": ["ssh_sftpd"], "packageName": "erlang/otp", "packageURL": "pkg:github/erlang/otp", "product": "OTP", "programFiles": ["lib/ssh/src/ssh_sftpd.erl"], "programRoutines": [{"name": "ssh_sftpd:handle_op/4"}], "repo": "https://github.com/erlang/otp", "vendor": "Erlang", "versions": [{"lessThan": "8f4224a0d2676b0653d2c71a889a956e8c2c62d6", "status": "affected", "version": "08225797f7ef943d0c82a1d9dd6650d94ca2580d", "versionType": "git"}, {"lessThan": "*", "status": "unaffected", "version": "8f4224a0d2676b0653d2c71a889a956e8c2c62d6", "versionType": "git"}]}], "configurations": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>The SFTP subsystem must be enabled on the SSH server and the <code>root</code> option must be configured in the <code>ssh_sftpd:subsystem_spec/1</code> call. Deployments without the <code>root</code> option are not affected.</p>"}, {"base64": false, "type": "text/markdown", "value": "The SFTP subsystem must be enabled on the SSH server and the `root` option must be configured in the `ssh_sftpd:subsystem_spec/1` call. Deployments without the `root` option are not affected."}], "value": "The SFTP subsystem must be enabled on the SSH server and the root option must be configured in the ssh_sftpd:subsystem_spec/1 call. Deployments without the root option are not affected."}], "cpeApplicability": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*", "versionEndExcluding": "27.3.4.13", "vulnerable": true}, {"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*", "versionEndExcluding": "28.5.0.2", "versionStartIncluding": "28.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*", "versionEndExcluding": "29.0.2", "versionStartIncluding": "29.0", "vulnerable": true}], "negate": false, "operator": "OR"}], "operator": "AND"}], "credits": [{"lang": "en", "type": "finder", "value": "Jonatan M\u00e4nnchen / EEF"}, {"lang": "en", "type": "remediation developer", "value": "Jonatan M\u00e4nnchen / EEF"}, {"lang": "en", "type": "remediation developer", "value": "Micha\u0142 W\u0105sowski"}, {"lang": "en", "type": "remediation reviewer", "value": "Jakub Witczak"}], "datePublic": "2026-06-10T14:35:49.000Z", "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Erlang OTP ssh (<code>ssh_sftpd</code> module) allows File Discovery.</p>\n<p>The <code>SSH_FXP_READLINK</code> handler in <code>ssh_sftpd</code> sends the raw result of <code>file:read_link/2</code> to the client without calling <code>chroot_filename/2</code> to strip the backend root prefix. An authenticated SFTP client can create a symlink inside the chroot pointing to <code>/</code>; <code>ssh_sftpd</code> resolves the target to the absolute backend root and stores it on disk. Reading the symlink back via <code>SSH_FXP_READLINK</code> returns that absolute path, for example <code>/data/sftp</code>, instead of the chrooted value <code>/</code>.</p>\n<p>The information disclosed is the absolute filesystem path of the SFTP root directory and of any symlink targets within it. No file contents, credentials, or access to paths outside the root directory are obtainable through this issue alone.</p>\n<p>This vulnerability is associated with program files <code>lib/ssh/src/ssh_sftpd.erl</code>.</p>\n<p>This issue affects OTP from OTP&nbsp;17.0 before OTP&nbsp;27.3.4.13, OTP&nbsp;28.5.0.2, and OTP&nbsp;29.0.2, corresponding to ssh from 3.0.1 before 5.2.11.8, 5.5.2.1, and 6.0.1. Whether OTP before OTP&nbsp;17.0, corresponding to ssh before 3.0.1, is affected is unknown.</p>"}, {"base64": false, "type": "text/markdown", "value": "Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Erlang OTP ssh (`ssh_sftpd` module) allows File Discovery.\n\nThe `SSH_FXP_READLINK` handler in `ssh_sftpd` sends the raw result of `file:read_link/2` to the client without calling `chroot_filename/2` to strip the backend root prefix. An authenticated SFTP client can create a symlink inside the chroot pointing to `/`; `ssh_sftpd` resolves the target to the absolute backend root and stores it on disk. Reading the symlink back via `SSH_FXP_READLINK` returns that absolute path, for example `/data/sftp`, instead of the chrooted value `/`.\n\nThe information disclosed is the absolute filesystem path of the SFTP root directory and of any symlink targets within it. No file contents, credentials, or access to paths outside the root directory are obtainable through this issue alone.\n\nThis vulnerability is associated with program files `lib/ssh/src/ssh_sftpd.erl`.\n\nThis issue affects OTP from OTP\u00a017.0 before OTP\u00a027.3.4.13, OTP\u00a028.5.0.2, and OTP\u00a029.0.2, corresponding to ssh from 3.0.1 before 5.2.11.8, 5.5.2.1, and 6.0.1. Whether OTP before OTP\u00a017.0, corresponding to ssh before 3.0.1, is affected is unknown."}], "value": "Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Erlang OTP ssh (ssh_sftpd module) allows File Discovery.\n\nThe SSH_FXP_READLINK handler in ssh_sftpd sends the raw result of file:read_link/2 to the client without calling chroot_filename/2 to strip the backend root prefix. An authenticated SFTP client can create a symlink inside the chroot pointing to /; ssh_sftpd resolves the target to the absolute backend root and stores it on disk. Reading the symlink back via SSH_FXP_READLINK returns that absolute path, for example /data/sftp, instead of the chrooted value /.\n\nThe information disclosed is the absolute filesystem path of the SFTP root directory and of any symlink targets within it. No file contents, credentials, or access to paths outside the root directory are obtainable through this issue alone.\n\nThis vulnerability is associated with program files lib/ssh/src/ssh_sftpd.erl.\n\nThis issue affects OTP from OTP\u00a017.0 before OTP\u00a027.3.4.13, OTP\u00a028.5.0.2, and OTP\u00a029.0.2, corresponding to ssh from 3.0.1 before 5.2.11.8, 5.5.2.1, and 6.0.1. Whether OTP before OTP\u00a017.0, corresponding to ssh before 3.0.1, is affected is unknown."}], "impacts": [{"capecId": "CAPEC-116", "descriptions": [{"lang": "en", "value": "CAPEC-116 Excavation"}]}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "baseScore": 2.3, "baseSeverity": "LOW", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-200", "description": "CWE-200 Exposure of Sensitive Information to an Unauthorized Actor", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "shortName": "EEF", "dateUpdated": "2026-09-24T20:35:33.970Z"}, "references": [{"tags": ["vendor-advisory", "related"], "url": "https://github.com/erlang/otp/security/advisories/GHSA-pv7g-pjrq-x2fh"}, {"name": "EEF CNA record for CVE-2026-48855", "tags": ["related"], "url": "https://cna.erlef.org/cves/CVE-2026-48855.html"}, {"name": "OSV record EEF-CVE-2026-48855", "tags": ["related"], "url": "https://osv.dev/vulnerability/EEF-CVE-2026-48855"}, {"name": "Erlang/OTP version ordering", "tags": ["x_version-scheme"], "url": "https://www.erlang.org/doc/system/versions.html#order-of-versions"}, {"name": "Introducing commit 0822579 in erlang/otp", "tags": ["related"], "url": "https://github.com/erlang/otp/commit/08225797f7ef943d0c82a1d9dd6650d94ca2580d"}, {"name": "Fix commit 8f4224a in erlang/otp", "tags": ["patch"], "url": "https://github.com/erlang/otp/commit/8f4224a0d2676b0653d2c71a889a956e8c2c62d6"}], "source": {"discovery": "INTERNAL"}, "title": "SFTP READLINK Leaks Absolute Backend Filesystem Path When Root Is Configured", "workarounds": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<ul>\n<li>Use OS-level chroot to run the Erlang VM/SFTP server process in an isolated filesystem environment, eliminating reliance on the application-level <code>root</code> option.</li>\n<li>Ensure that the SFTP server port is not reachable from untrusted machines.</li>\n<li>Ensure that no sensitive information (usernames, project names, mount topology) is inferrable from the absolute path of the configured root directory.</li>\n</ul>"}, {"base64": false, "type": "text/markdown", "value": "* Use OS-level chroot to run the Erlang VM/SFTP server process in an isolated filesystem environment, eliminating reliance on the application-level `root` option.\n* Ensure that the SFTP server port is not reachable from untrusted machines.\n* Ensure that no sensitive information (usernames, project names, mount topology) is inferrable from the absolute path of the configured root directory."}], "value": "* Use OS-level chroot to run the Erlang VM/SFTP server process in an isolated filesystem environment, eliminating reliance on the application-level root option.\n* Ensure that the SFTP server port is not reachable from untrusted machines.\n* Ensure that no sensitive information (usernames, project names, mount topology) is inferrable from the absolute path of the configured root directory."}]}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-06-10T16:22:16.684743Z", "id": "CVE-2026-48855", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-10T16:22:24.746Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-48855", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-10T16:22:16.684743Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-10T16:22:20.955Z"}}], "cna": {"title": "SFTP READLINK Leaks Absolute Backend Filesystem Path When Root Is Configured", "source": {"discovery": "INTERNAL"}, "credits": [{"lang": "en", "type": "finder", "value": "Jonatan M\u00e4nnchen / EEF"}, {"lang": "en", "type": "remediation developer", "value": "Jonatan M\u00e4nnchen / EEF"}, {"lang": "en", "type": "remediation developer", "value": "Micha\u0142 W\u0105sowski"}, {"lang": "en", "type": "remediation reviewer", "value": "Jakub Witczak"}], "impacts": [{"capecId": "CAPEC-116", "descriptions": [{"lang": "en", "value": "CAPEC-116 Excavation"}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 2.3, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "LOW", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"cpes": ["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"], "vendor": "Erlang", "modules": ["ssh_sftpd"], "product": "OTP", "versions": [{"status": "affected", "changes": [{"at": "27.3.4.13", "status": "unaffected"}, {"at": "28.5.0.2", "status": "unaffected"}, {"at": "29.0.2", "status": "unaffected"}], "version": "17.0", "lessThan": "*", "versionType": "otp"}], "packageURL": "pkg:software-id/erlang.org/otp", "packageName": "otp", "programFiles": ["lib/ssh/src/ssh_sftpd.erl"], "defaultStatus": "unknown", "programRoutines": [{"name": "ssh_sftpd:handle_op/4"}]}, {"cpes": ["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"], "repo": "https://github.com/erlang/otp", "vendor": "Erlang", "modules": ["ssh_sftpd"], "product": "OTP", "versions": [{"status": "affected", "changes": [{"at": "5.2.11.8", "status": "unaffected"}, {"at": "5.5.2.1", "status": "unaffected"}, {"at": "6.0.1", "status": "unaffected"}], "version": "3.0.1", "lessThan": "*", "versionType": "otp"}], "packageURL": "pkg:otp/ssh?repository_url=https:%2F%2Fgithub.com%2Ferlang%2Fotp&vcs_url=git%2Bhttps:%2F%2Fgithub.com%2Ferlang%2Fotp.git", "packageName": "ssh", "programFiles": ["src/ssh_sftpd.erl"], "defaultStatus": "unknown", "programRoutines": [{"name": "ssh_sftpd:handle_op/4"}]}, {"cpes": ["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"], "repo": "https://github.com/erlang/otp", "vendor": "Erlang", "modules": ["ssh_sftpd"], "product": "OTP", "versions": [{"status": "affected", "version": "08225797f7ef943d0c82a1d9dd6650d94ca2580d", "lessThan": "8f4224a0d2676b0653d2c71a889a956e8c2c62d6", "versionType": "git"}, {"status": "unaffected", "version": "8f4224a0d2676b0653d2c71a889a956e8c2c62d6", "lessThan": "*", "versionType": "git"}], "packageURL": "pkg:github/erlang/otp", "packageName": "erlang/otp", "programFiles": ["lib/ssh/src/ssh_sftpd.erl"], "collectionURL": "https://github.com", "defaultStatus": "unknown", "programRoutines": [{"name": "ssh_sftpd:handle_op/4"}]}], "datePublic": "2026-06-10T14:35:49.000Z", "references": [{"url": "https://github.com/erlang/otp/security/advisories/GHSA-pv7g-pjrq-x2fh", "tags": ["vendor-advisory", "related"]}, {"url": "https://cna.erlef.org/cves/CVE-2026-48855.html", "name": "EEF CNA record for CVE-2026-48855", "tags": ["related"]}, {"url": "https://osv.dev/vulnerability/EEF-CVE-2026-48855", "name": "OSV record EEF-CVE-2026-48855", "tags": ["related"]}, {"url": "https://www.erlang.org/doc/system/versions.html#order-of-versions", "name": "Erlang/OTP version ordering", "tags": ["x_version-scheme"]}, {"url": "https://github.com/erlang/otp/commit/08225797f7ef943d0c82a1d9dd6650d94ca2580d", "name": "Introducing commit 0822579 in erlang/otp", "tags": ["related"]}, {"url": "https://github.com/erlang/otp/commit/8f4224a0d2676b0653d2c71a889a956e8c2c62d6", "name": "Fix commit 8f4224a in erlang/otp", "tags": ["patch"]}], "workarounds": [{"lang": "en", "value": "* Use OS-level chroot to run the Erlang VM/SFTP server process in an isolated filesystem environment, eliminating reliance on the application-level root option.\n* Ensure that the SFTP server port is not reachable from untrusted machines.\n* Ensure that no sensitive information (usernames, project names, mount topology) is inferrable from the absolute path of the configured root directory.", "supportingMedia": [{"type": "text/html", "value": "<ul>\n<li>Use OS-level chroot to run the Erlang VM/SFTP server process in an isolated filesystem environment, eliminating reliance on the application-level <code>root</code> option.</li>\n<li>Ensure that the SFTP server port is not reachable from untrusted machines.</li>\n<li>Ensure that no sensitive information (usernames, project names, mount topology) is inferrable from the absolute path of the configured root directory.</li>\n</ul>", "base64": false}, {"type": "text/markdown", "value": "* Use OS-level chroot to run the Erlang VM/SFTP server process in an isolated filesystem environment, eliminating reliance on the application-level `root` option.\n* Ensure that the SFTP server port is not reachable from untrusted machines.\n* Ensure that no sensitive information (usernames, project names, mount topology) is inferrable from the absolute path of the configured root directory.", "base64": false}]}], "descriptions": [{"lang": "en", "value": "Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Erlang OTP ssh (ssh_sftpd module) allows File Discovery.\n\nThe SSH_FXP_READLINK handler in ssh_sftpd sends the raw result of file:read_link/2 to the client without calling chroot_filename/2 to strip the backend root prefix. An authenticated SFTP client can create a symlink inside the chroot pointing to /; ssh_sftpd resolves the target to the absolute backend root and stores it on disk. Reading the symlink back via SSH_FXP_READLINK returns that absolute path, for example /data/sftp, instead of the chrooted value /.\n\nThe information disclosed is the absolute filesystem path of the SFTP root directory and of any symlink targets within it. No file contents, credentials, or access to paths outside the root directory are obtainable through this issue alone.\n\nThis vulnerability is associated with program files lib/ssh/src/ssh_sftpd.erl.\n\nThis issue affects OTP from OTP\u00a017.0 before OTP\u00a027.3.4.13, OTP\u00a028.5.0.2, and OTP\u00a029.0.2, corresponding to ssh from 3.0.1 before 5.2.11.8, 5.5.2.1, and 6.0.1. Whether OTP before OTP\u00a017.0, corresponding to ssh before 3.0.1, is affected is unknown.", "supportingMedia": [{"type": "text/html", "value": "<p>Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Erlang OTP ssh (<code>ssh_sftpd</code> module) allows File Discovery.</p>\n<p>The <code>SSH_FXP_READLINK</code> handler in <code>ssh_sftpd</code> sends the raw result of <code>file:read_link/2</code> to the client without calling <code>chroot_filename/2</code> to strip the backend root prefix. An authenticated SFTP client can create a symlink inside the chroot pointing to <code>/</code>; <code>ssh_sftpd</code> resolves the target to the absolute backend root and stores it on disk. Reading the symlink back via <code>SSH_FXP_READLINK</code> returns that absolute path, for example <code>/data/sftp</code>, instead of the chrooted value <code>/</code>.</p>\n<p>The information disclosed is the absolute filesystem path of the SFTP root directory and of any symlink targets within it. No file contents, credentials, or access to paths outside the root directory are obtainable through this issue alone.</p>\n<p>This vulnerability is associated with program files <code>lib/ssh/src/ssh_sftpd.erl</code>.</p>\n<p>This issue affects OTP from OTP&nbsp;17.0 before OTP&nbsp;27.3.4.13, OTP&nbsp;28.5.0.2, and OTP&nbsp;29.0.2, corresponding to ssh from 3.0.1 before 5.2.11.8, 5.5.2.1, and 6.0.1. Whether OTP before OTP&nbsp;17.0, corresponding to ssh before 3.0.1, is affected is unknown.</p>", "base64": false}, {"type": "text/markdown", "value": "Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Erlang OTP ssh (`ssh_sftpd` module) allows File Discovery.\n\nThe `SSH_FXP_READLINK` handler in `ssh_sftpd` sends the raw result of `file:read_link/2` to the client without calling `chroot_filename/2` to strip the backend root prefix. An authenticated SFTP client can create a symlink inside the chroot pointing to `/`; `ssh_sftpd` resolves the target to the absolute backend root and stores it on disk. Reading the symlink back via `SSH_FXP_READLINK` returns that absolute path, for example `/data/sftp`, instead of the chrooted value `/`.\n\nThe information disclosed is the absolute filesystem path of the SFTP root directory and of any symlink targets within it. No file contents, credentials, or access to paths outside the root directory are obtainable through this issue alone.\n\nThis vulnerability is associated with program files `lib/ssh/src/ssh_sftpd.erl`.\n\nThis issue affects OTP from OTP\u00a017.0 before OTP\u00a027.3.4.13, OTP\u00a028.5.0.2, and OTP\u00a029.0.2, corresponding to ssh from 3.0.1 before 5.2.11.8, 5.5.2.1, and 6.0.1. Whether OTP before OTP\u00a017.0, corresponding to ssh before 3.0.1, is affected is unknown.", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-200", "description": "CWE-200 Exposure of Sensitive Information to an Unauthorized Actor"}]}], "configurations": [{"lang": "en", "value": "The SFTP subsystem must be enabled on the SSH server and the root option must be configured in the ssh_sftpd:subsystem_spec/1 call. Deployments without the root option are not affected.", "supportingMedia": [{"type": "text/html", "value": "<p>The SFTP subsystem must be enabled on the SSH server and the <code>root</code> option must be configured in the <code>ssh_sftpd:subsystem_spec/1</code> call. Deployments without the <code>root</code> option are not affected.</p>", "base64": false}, {"type": "text/markdown", "value": "The SFTP subsystem must be enabled on the SSH server and the `root` option must be configured in the `ssh_sftpd:subsystem_spec/1` call. Deployments without the `root` option are not affected.", "base64": false}]}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "27.3.4.13"}, {"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "28.5.0.2", "versionStartIncluding": "28.0"}, {"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "29.0.2", "versionStartIncluding": "29.0"}], "operator": "OR"}], "operator": "AND"}], "providerMetadata": {"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "shortName": "EEF", "dateUpdated": "2026-09-24T20:35:33.970Z"}}}, "cveMetadata": {"cveId": "CVE-2026-48855", "state": "PUBLISHED", "dateUpdated": "2026-09-24T20:35:33.970Z", "dateReserved": "2026-05-25T20:44:10.697Z", "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "datePublished": "2026-06-10T14:35:49.683Z", "assignerShortName": "EEF"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"cpes": ["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"], "defaultStatus": "unknown", "modules": ["ssh_sftpd"], "packageName": "otp", "packageURL": "pkg:software-id/erlang.org/otp", "product": "OTP", "programFiles": ["lib/ssh/src/ssh_sftpd.erl"], "programRoutines": [{"name": "ssh_sftpd:handle_op/4"}], "vendor": "Erlang", "versions": [{"changes": [{"at": "27.3.4.13", "status": "unaffected"}, {"at": "28.5.0.2", "status": "unaffected"}, {"at": "29.0.2", "status": "unaffected"}], "lessThan": "*", "status": "affected", "version": "17.0", "versionType": "otp"}]}, {"cpes": ["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"], "defaultStatus": "unknown", "modules": ["ssh_sftpd"], "packageName": "ssh", "packageURL": "pkg:otp/ssh?repository_url=https:%2F%2Fgithub.com%2Ferlang%2Fotp&vcs_url=git%2Bhttps:%2F%2Fgithub.com%2Ferlang%2Fotp.git", "product": "OTP", "programFiles": ["src/ssh_sftpd.erl"], "programRoutines": [{"name": "ssh_sftpd:handle_op/4"}], "repo": "https://github.com/erlang/otp", "vendor": "Erlang", "versions": [{"changes": [{"at": "5.2.11.8", "status": "unaffected"}, {"at": "5.5.2.1", "status": "unaffected"}, {"at": "6.0.1", "status": "unaffected"}], "lessThan": "*", "status": "affected", "version": "3.0.1", "versionType": "otp"}]}, {"collectionURL": "https://github.com", "cpes": ["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"], "defaultStatus": "unknown", "modules": ["ssh_sftpd"], "packageName": "erlang/otp", "packageURL": "pkg:github/erlang/otp", "product": "OTP", "programFiles": ["lib/ssh/src/ssh_sftpd.erl"], "programRoutines": [{"name": "ssh_sftpd:handle_op/4"}], "repo": "https://github.com/erlang/otp", "vendor": "Erlang", "versions": [{"lessThan": "8f4224a0d2676b0653d2c71a889a956e8c2c62d6", "status": "affected", "version": "08225797f7ef943d0c82a1d9dd6650d94ca2580d", "versionType": "git"}, {"lessThan": "*", "status": "unaffected", "version": "8f4224a0d2676b0653d2c71a889a956e8c2c62d6", "versionType": "git"}]}], "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*", "matchCriteriaId": "BF42A5F2-4C27-43FE-B5FA-17A3422B9649", "versionEndExcluding": "27.3.4.13", "versionStartIncluding": "17.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*", "matchCriteriaId": "902ED4C3-B9DE-4ABC-9BEA-D23DA4F5D373", "versionEndExcluding": "28.5.0.2", "versionStartIncluding": "28.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*", "matchCriteriaId": "F4AB1573-4E81-4338-B65A-B3C94C7249FA", "versionEndExcluding": "29.0.2", "versionStartIncluding": "29.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:erlang:erlang\\/ssh:*:*:*:*:*:*:*:*", "matchCriteriaId": "83A78B2F-66C5-4840-9F31-3A0143B36705", "versionEndExcluding": "5.2.11.8", "versionStartIncluding": "3.0.1", "vulnerable": true}, {"criteria": "cpe:2.3:a:erlang:erlang\\/ssh:*:*:*:*:*:*:*:*", "matchCriteriaId": "468A97BF-9BB0-4318-A6E9-CF69EFE385B7", "versionEndExcluding": "5.5.2.1", "versionStartIncluding": "5.5", "vulnerable": true}, {"criteria": "cpe:2.3:a:erlang:erlang\\/ssh:*:*:*:*:*:*:*:*", "matchCriteriaId": "0BF9A1F8-83F5-4BEB-A972-3AF5B15947EF", "versionEndExcluding": "6.0.1", "versionStartIncluding": "6.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Erlang OTP ssh (ssh_sftpd module) allows File Discovery.\n\nThe SSH_FXP_READLINK handler in ssh_sftpd sends the raw result of file:read_link/2 to the client without calling chroot_filename/2 to strip the backend root prefix. An authenticated SFTP client can create a symlink inside the chroot pointing to /; ssh_sftpd resolves the target to the absolute backend root and stores it on disk. Reading the symlink back via SSH_FXP_READLINK returns that absolute path, for example /data/sftp, instead of the chrooted value /.\n\nThe information disclosed is the absolute filesystem path of the SFTP root directory and of any symlink targets within it. No file contents, credentials, or access to paths outside the root directory are obtainable through this issue alone.\n\nThis vulnerability is associated with program files lib/ssh/src/ssh_sftpd.erl.\n\nThis issue affects OTP from OTP\u00a017.0 before OTP\u00a027.3.4.13, OTP\u00a028.5.0.2, and OTP\u00a029.0.2, corresponding to ssh from 3.0.1 before 5.2.11.8, 5.5.2.1, and 6.0.1. Whether OTP before OTP\u00a017.0, corresponding to ssh before 3.0.1, is affected is unknown."}, {"lang": "es", "value": "La vulnerabilidad de Exposici\u00f3n de Informaci\u00f3n Sensible a un Actor No Autorizado en Erlang OTP ssh (m\u00f3dulo ssh_sftpd) permite el Descubrimiento de Archivos.\n\nEl gestor SSH_FXP_READLINK en ssh_sftpd env\u00eda el resultado en bruto de file:read_link/2 al cliente sin llamar a chroot_filename/2 para eliminar el prefijo de la ra\u00edz del backend. Un cliente SFTP autenticado puede crear un enlace simb\u00f3lico dentro del chroot apuntando a /; ssh_sftpd resuelve el objetivo a la ra\u00edz absoluta del backend y lo almacena en disco. Leer el enlace simb\u00f3lico de vuelta a trav\u00e9s de SSH_FXP_READLINK devuelve esa ruta absoluta, por ejemplo /data/sftp, en lugar del valor chrooted /.\n\nLa informaci\u00f3n divulgada es la ruta absoluta del sistema de archivos del directorio ra\u00edz SFTP y de cualquier objetivo de enlace simb\u00f3lico dentro de \u00e9l. No se pueden obtener contenidos de archivos, credenciales o acceso a rutas fuera del directorio ra\u00edz a trav\u00e9s de este problema solamente.\n\nEsta vulnerabilidad est\u00e1 asociada con los archivos de programa lib/ssh/src/ssh_sftpd.erl.\n\nEste problema afecta a OTP desde OTP 17.0 antes de 29.0.2, 28.5.0.2 y 27.3.4.13 correspondiente a ssh desde 3.0.1 antes de 6.0.1, 5.5.2.1 y 5.2.11.8."}], "id": "CVE-2026-48855", "lastModified": "2026-10-25T23:10:00.167", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 2.3, "baseSeverity": "LOW", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-48855", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-06-10T16:22:16.684743Z", "version": "2.0.3"}}]}, "published": "2026-06-10T16:17:09.680", "references": [{"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "tags": ["Mitigation", "Third Party Advisory"], "url": "https://cna.erlef.org/cves/CVE-2026-48855.html"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://github.com/erlang/otp/commit/08225797f7ef943d0c82a1d9dd6650d94ca2580d"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "tags": ["Patch"], "url": "https://github.com/erlang/otp/commit/8f4224a0d2676b0653d2c71a889a956e8c2c62d6"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "tags": ["Mitigation", "Vendor Advisory"], "url": "https://github.com/erlang/otp/security/advisories/GHSA-pv7g-pjrq-x2fh"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "tags": ["Mitigation", "Third Party Advisory"], "url": "https://osv.dev/vulnerability/EEF-CVE-2026-48855"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "tags": ["Product"], "url": "https://www.erlang.org/doc/system/versions.html#order-of-versions"}], "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-200"}], "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "type": "Secondary"}]}

{"bugzilla": {"description": "erlang: Erlang OTP ssh: Information disclosure via symlink resolution in SFTP", "id": "2487603", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2487603"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "status": "draft"}, "cwe": "CWE-59", "details": ["Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Erlang OTP ssh (ssh_sftpd module) allows File Discovery.\nThe SSH_FXP_READLINK handler in ssh_sftpd sends the raw result of file:read_link/2 to the client without calling chroot_filename/2 to strip the backend root prefix. An authenticated SFTP client can create a symlink inside the chroot pointing to /; ssh_sftpd resolves the target to the absolute backend root and stores it on disk. Reading the symlink back via SSH_FXP_READLINK returns that absolute path, for example /data/sftp, instead of the chrooted value /.\nThe information disclosed is the absolute filesystem path of the SFTP root directory and of any symlink targets within it. No file contents, credentials, or access to paths outside the root directory are obtainable through this issue alone.\nThis vulnerability is associated with program files lib/ssh/src/ssh_sftpd.erl.\nThis issue affects OTP from OTP 17.0 before 29.0.2, 28.5.0.2 and 27.3.4.13 corresponding to ssh from 3.0.1 before 6.0.1, 5.5.2.1 and 5.2.11.8.", "A flaw was found in Erlang OTP ssh, specifically within the `ssh_sftpd` module. An authenticated SFTP client can exploit this vulnerability by creating a symbolic link (symlink) inside a restricted directory (chroot) that points to the root directory. When the client reads this symlink, the `ssh_sftpd` module incorrectly reveals the absolute filesystem path of the SFTP root directory and any symlink targets, rather than the expected restricted path. This exposure of sensitive information allows for file discovery, but does not grant access to file contents, credentials, or paths outside the root directory."], "name": "CVE-2026-48855", "package_state": [{"cpe": "cpe:/a:redhat:openstack:16.2", "fix_state": "Fix deferred", "package_name": "erlang", "product_name": "Red Hat OpenStack Platform 16.2"}, {"cpe": "cpe:/a:redhat:openstack:17.1", "fix_state": "Fix deferred", "package_name": "erlang", "product_name": "Red Hat OpenStack Platform 17.1"}, {"cpe": "cpe:/a:redhat:openstack:18.0", "fix_state": "Fix deferred", "package_name": "erlang", "product_name": "Red Hat OpenStack Platform 18.0"}], "public_date": "2026-06-10T14:35:49Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-48855\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-48855\nhttps://cna.erlef.org/cves/CVE-2026-48855.html\nhttps://github.com/erlang/otp/commit/8f4224a0d2676b0653d2c71a889a956e8c2c62d6\nhttps://github.com/erlang/otp/security/advisories/GHSA-pv7g-pjrq-x2fh\nhttps://osv.dev/vulnerability/EEF-CVE-2026-48855\nhttps://www.erlang.org/doc/system/versions.html#order-of-versions"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.0.1,*]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[17.0,*]"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "OTP", "source": "cna", "vendor": "Erlang"}, "product": "erlang/otp", "vendor": "erlang"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[17.0,*]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[08225797f7ef943d0c82a1d9dd6650d94ca2580d,8f4224a0d2676b0653d2c71a889a956e8c2c62d6)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "OTP", "source": "cna", "vendor": "Erlang"}, "product": "otp", "vendor": "erlang"}], "created": "2026-06-10T18:00:15.867544+00:00", "updated": "2026-09-26T07:15:06.919099+00:00", "vendors": ["erlang", "erlang$PRODUCT$erlang/otp", "erlang$PRODUCT$otp"]}