CVE-2026-32147

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-32147", "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "state": "PUBLISHED", "assignerShortName": "EEF", "dateReserved": "2026-03-10T22:37:29.213Z", "datePublished": "2026-04-21T12:01:20.350Z", "dateUpdated": "2026-11-11T19:21:07.336Z"}, "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:do_open/4"}, {"name": "ssh_sftpd:handle_op/4"}], "vendor": "Erlang", "versions": [{"changes": [{"at": "26.2.5.20", "status": "unaffected"}, {"at": "27.3.4.11", "status": "unaffected"}, {"at": "28.4.3", "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:do_open/4"}, {"name": "ssh_sftpd:handle_op/4"}], "repo": "https://github.com/erlang/otp", "vendor": "Erlang", "versions": [{"changes": [{"at": "5.1.4.15", "status": "unaffected"}, {"at": "5.2.11.7", "status": "unaffected"}, {"at": "5.5.2", "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:do_open/4"}, {"name": "ssh_sftpd:handle_op/4"}], "repo": "https://github.com/erlang/otp", "vendor": "Erlang", "versions": [{"lessThan": "28c5d5a6c5f873dc701b597276271763e7d1c004", "status": "affected", "version": "07b8f441ca711f9812fad9e9115bab3c3aa92f79", "versionType": "git"}, {"lessThan": "*", "status": "unaffected", "version": "28c5d5a6c5f873dc701b597276271763e7d1c004", "versionType": "git"}]}], "configurations": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>The SFTP subsystem must be configured with the <code>root</code> option in <code>ssh_sftpd:subsystem_spec/1</code>. The <code>root</code> option is not set by default.</p>"}, {"base64": false, "type": "text/markdown", "value": "The SFTP subsystem must be configured with the `root` option in `ssh_sftpd:subsystem_spec/1`. The `root` option is not set by default."}], "value": "The SFTP subsystem must be configured with the root option in ssh_sftpd:subsystem_spec/1. The root option is not set by default."}], "cpeApplicability": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*", "versionEndExcluding": "26.2.5.20", "vulnerable": true}, {"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*", "versionEndExcluding": "27.3.4.11", "versionStartIncluding": "27.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*", "versionEndExcluding": "28.4.3", "versionStartIncluding": "28.0", "vulnerable": true}], "negate": false, "operator": "OR"}], "operator": "AND"}], "credits": [{"lang": "en", "type": "finder", "value": "John Downey"}, {"lang": "en", "type": "remediation developer", "value": "Micha\u0142 W\u0105sowski"}, {"lang": "en", "type": "remediation reviewer", "value": "Jakub Witczak"}], "datePublic": "2026-04-21T12:01:20.000Z", "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in Erlang OTP <code>ssh</code> (<code>ssh_sftpd</code> module) allows an authenticated SFTP user to modify file attributes outside the configured chroot directory.</p>\n<p>The SFTP daemon (<code>ssh_sftpd</code>) stores the raw, user-supplied path in file handles instead of the chroot-resolved path. When <code>SSH_FXP_FSETSTAT</code> is issued on such a handle, file attributes (permissions, ownership, timestamps) are modified on the real filesystem path, bypassing the root directory boundary entirely.</p>\n<p>Any authenticated SFTP user on a server configured with the <code>root</code> option can modify file attributes of files outside the intended chroot boundary. The prerequisite is that a target file must exist on the real filesystem at the same relative path. Note that this vulnerability only allows modification of file attributes; file contents cannot be read or altered through this attack vector.</p>\n<p>If the SSH daemon runs as <code>root</code>, this enables direct privilege escalation: an attacker can set the setuid bit on any binary, change ownership of sensitive files, or make system configuration world-writable.</p>\n<p>This vulnerability is associated with program files <code>lib/ssh/src/ssh_sftpd.erl</code> and program routines <code>ssh_sftpd:do_open/4</code> and <code>ssh_sftpd:handle_op/4</code>.</p>\n<p>This issue affects OTP from OTP&nbsp;17.0 before OTP&nbsp;26.2.5.20, OTP&nbsp;27.3.4.11, and OTP&nbsp;28.4.3, corresponding to ssh from 3.0.1 before 5.1.4.15, 5.2.11.7, and 5.5.2. 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": "Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in Erlang OTP `ssh` (`ssh_sftpd` module) allows an authenticated SFTP user to modify file attributes outside the configured chroot directory.\n\nThe SFTP daemon (`ssh_sftpd`) stores the raw, user-supplied path in file handles instead of the chroot-resolved path. When `SSH_FXP_FSETSTAT` is issued on such a handle, file attributes (permissions, ownership, timestamps) are modified on the real filesystem path, bypassing the root directory boundary entirely.\n\nAny authenticated SFTP user on a server configured with the `root` option can modify file attributes of files outside the intended chroot boundary. The prerequisite is that a target file must exist on the real filesystem at the same relative path. Note that this vulnerability only allows modification of file attributes; file contents cannot be read or altered through this attack vector.\n\nIf the SSH daemon runs as `root`, this enables direct privilege escalation: an attacker can set the setuid bit on any binary, change ownership of sensitive files, or make system configuration world-writable.\n\nThis vulnerability is associated with program files `lib/ssh/src/ssh_sftpd.erl` and program routines `ssh_sftpd:do_open/4` and `ssh_sftpd:handle_op/4`.\n\nThis issue affects OTP from OTP\u00a017.0 before OTP\u00a026.2.5.20, OTP\u00a027.3.4.11, and OTP\u00a028.4.3, corresponding to ssh from 3.0.1 before 5.1.4.15, 5.2.11.7, and 5.5.2. Whether OTP before OTP\u00a017.0, corresponding to ssh before 3.0.1, is affected is unknown."}], "value": "Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in Erlang OTP ssh (ssh_sftpd module) allows an authenticated SFTP user to modify file attributes outside the configured chroot directory.\n\nThe SFTP daemon (ssh_sftpd) stores the raw, user-supplied path in file handles instead of the chroot-resolved path. When SSH_FXP_FSETSTAT is issued on such a handle, file attributes (permissions, ownership, timestamps) are modified on the real filesystem path, bypassing the root directory boundary entirely.\n\nAny authenticated SFTP user on a server configured with the root option can modify file attributes of files outside the intended chroot boundary. The prerequisite is that a target file must exist on the real filesystem at the same relative path. Note that this vulnerability only allows modification of file attributes; file contents cannot be read or altered through this attack vector.\n\nIf the SSH daemon runs as root, this enables direct privilege escalation: an attacker can set the setuid bit on any binary, change ownership of sensitive files, or make system configuration world-writable.\n\nThis vulnerability is associated with program files lib/ssh/src/ssh_sftpd.erl and program routines ssh_sftpd:do_open/4 and ssh_sftpd:handle_op/4.\n\nThis issue affects OTP from OTP\u00a017.0 before OTP\u00a026.2.5.20, OTP\u00a027.3.4.11, and OTP\u00a028.4.3, corresponding to ssh from 3.0.1 before 5.1.4.15, 5.2.11.7, and 5.5.2. Whether OTP before OTP\u00a017.0, corresponding to ssh before 3.0.1, is affected is unknown."}], "impacts": [{"capecId": "CAPEC-126", "descriptions": [{"lang": "en", "value": "CAPEC-126 Path Traversal"}]}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "baseScore": 5.3, "baseSeverity": "MEDIUM", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "LOW", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-22", "description": "CWE-22 Improper Limitation of a Pathname to a Restricted Directory", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "shortName": "EEF", "dateUpdated": "2026-11-11T19:21:07.336Z"}, "references": [{"name": "Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in SFTP chroot", "tags": ["vendor-advisory", "related"], "url": "https://github.com/erlang/otp/security/advisories/GHSA-28jg-mw9x-hpm5"}, {"name": "EEF CNA record for CVE-2026-32147", "tags": ["related"], "url": "https://cna.erlef.org/cves/CVE-2026-32147.html"}, {"name": "OSV record EEF-CVE-2026-32147", "tags": ["related"], "url": "https://osv.dev/vulnerability/EEF-CVE-2026-32147"}, {"name": "Erlang/OTP version ordering", "tags": ["x_version-scheme"], "url": "https://www.erlang.org/doc/system/versions.html#order-of-versions"}, {"name": "Introducing commit 07b8f44 in erlang/otp", "tags": ["related"], "url": "https://github.com/erlang/otp/commit/07b8f441ca711f9812fad9e9115bab3c3aa92f79"}, {"name": "Fix commit 28c5d5a in erlang/otp", "tags": ["patch"], "url": "https://github.com/erlang/otp/commit/28c5d5a6c5f873dc701b597276271763e7d1c004"}], "source": {"discovery": "EXTERNAL"}, "title": "SFTP chroot bypass via path traversal in SSH_FXP_FSETSTAT", "workarounds": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<ul>\n<li>Do not use the <code>root</code> option in <code>ssh_sftpd:subsystem_spec/1</code>, and instead rely on OS-level chroot or container isolation to confine SFTP users.</li>\n<li>Ensure the Erlang VM is not running as a privileged OS user. Running the VM as an unprivileged user limits the impact of this vulnerability, since attribute modifications are constrained by that user's OS-level permissions.</li>\n</ul>"}, {"base64": false, "type": "text/markdown", "value": "* Do not use the `root` option in `ssh_sftpd:subsystem_spec/1`, and instead rely on OS-level chroot or container isolation to confine SFTP users.\n* Ensure the Erlang VM is not running as a privileged OS user. Running the VM as an unprivileged user limits the impact of this vulnerability, since attribute modifications are constrained by that user's OS-level permissions."}], "value": "* Do not use the root option in ssh_sftpd:subsystem_spec/1, and instead rely on OS-level chroot or container isolation to confine SFTP users.\n* Ensure the Erlang VM is not running as a privileged OS user. Running the VM as an unprivileged user limits the impact of this vulnerability, since attribute modifications are constrained by that user's OS-level permissions."}]}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-04-21T13:11:06.946869Z", "id": "CVE-2026-32147", "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": "2026-04-21T13:11:40.325Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-32147", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-04-21T13:11:06.946869Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-21T13:11:15.174Z"}}], "cna": {"title": "SFTP chroot bypass via path traversal in SSH_FXP_FSETSTAT", "source": {"discovery": "EXTERNAL"}, "credits": [{"lang": "en", "type": "finder", "value": "John Downey"}, {"lang": "en", "type": "remediation developer", "value": "Micha\u0142 W\u0105sowski"}, {"lang": "en", "type": "remediation reviewer", "value": "Jakub Witczak"}], "impacts": [{"capecId": "CAPEC-126", "descriptions": [{"lang": "en", "value": "CAPEC-126 Path Traversal"}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 5.3, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "subIntegrityImpact": "LOW", "vulnIntegrityImpact": "LOW", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "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": "26.2.5.20", "status": "unaffected"}, {"at": "27.3.4.11", "status": "unaffected"}, {"at": "28.4.3", "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:do_open/4"}, {"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": "5.1.4.15", "status": "unaffected"}, {"at": "5.2.11.7", "status": "unaffected"}, {"at": "5.5.2", "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:do_open/4"}, {"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": "07b8f441ca711f9812fad9e9115bab3c3aa92f79", "lessThan": "28c5d5a6c5f873dc701b597276271763e7d1c004", "versionType": "git"}, {"status": "unaffected", "version": "28c5d5a6c5f873dc701b597276271763e7d1c004", "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:do_open/4"}, {"name": "ssh_sftpd:handle_op/4"}]}], "datePublic": "2026-04-21T12:01:20.000Z", "references": [{"url": "https://github.com/erlang/otp/security/advisories/GHSA-28jg-mw9x-hpm5", "name": "Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in SFTP chroot", "tags": ["vendor-advisory", "related"]}, {"url": "https://cna.erlef.org/cves/CVE-2026-32147.html", "name": "EEF CNA record for CVE-2026-32147", "tags": ["related"]}, {"url": "https://osv.dev/vulnerability/EEF-CVE-2026-32147", "name": "OSV record EEF-CVE-2026-32147", "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/07b8f441ca711f9812fad9e9115bab3c3aa92f79", "name": "Introducing commit 07b8f44 in erlang/otp", "tags": ["related"]}, {"url": "https://github.com/erlang/otp/commit/28c5d5a6c5f873dc701b597276271763e7d1c004", "name": "Fix commit 28c5d5a in erlang/otp", "tags": ["patch"]}], "workarounds": [{"lang": "en", "value": "* Do not use the root option in ssh_sftpd:subsystem_spec/1, and instead rely on OS-level chroot or container isolation to confine SFTP users.\n* Ensure the Erlang VM is not running as a privileged OS user. Running the VM as an unprivileged user limits the impact of this vulnerability, since attribute modifications are constrained by that user's OS-level permissions.", "supportingMedia": [{"type": "text/html", "value": "<ul>\n<li>Do not use the <code>root</code> option in <code>ssh_sftpd:subsystem_spec/1</code>, and instead rely on OS-level chroot or container isolation to confine SFTP users.</li>\n<li>Ensure the Erlang VM is not running as a privileged OS user. Running the VM as an unprivileged user limits the impact of this vulnerability, since attribute modifications are constrained by that user's OS-level permissions.</li>\n</ul>", "base64": false}, {"type": "text/markdown", "value": "* Do not use the `root` option in `ssh_sftpd:subsystem_spec/1`, and instead rely on OS-level chroot or container isolation to confine SFTP users.\n* Ensure the Erlang VM is not running as a privileged OS user. Running the VM as an unprivileged user limits the impact of this vulnerability, since attribute modifications are constrained by that user's OS-level permissions.", "base64": false}]}], "descriptions": [{"lang": "en", "value": "Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in Erlang OTP ssh (ssh_sftpd module) allows an authenticated SFTP user to modify file attributes outside the configured chroot directory.\n\nThe SFTP daemon (ssh_sftpd) stores the raw, user-supplied path in file handles instead of the chroot-resolved path. When SSH_FXP_FSETSTAT is issued on such a handle, file attributes (permissions, ownership, timestamps) are modified on the real filesystem path, bypassing the root directory boundary entirely.\n\nAny authenticated SFTP user on a server configured with the root option can modify file attributes of files outside the intended chroot boundary. The prerequisite is that a target file must exist on the real filesystem at the same relative path. Note that this vulnerability only allows modification of file attributes; file contents cannot be read or altered through this attack vector.\n\nIf the SSH daemon runs as root, this enables direct privilege escalation: an attacker can set the setuid bit on any binary, change ownership of sensitive files, or make system configuration world-writable.\n\nThis vulnerability is associated with program files lib/ssh/src/ssh_sftpd.erl and program routines ssh_sftpd:do_open/4 and ssh_sftpd:handle_op/4.\n\nThis issue affects OTP from OTP\u00a017.0 before OTP\u00a026.2.5.20, OTP\u00a027.3.4.11, and OTP\u00a028.4.3, corresponding to ssh from 3.0.1 before 5.1.4.15, 5.2.11.7, and 5.5.2. Whether OTP before OTP\u00a017.0, corresponding to ssh before 3.0.1, is affected is unknown.", "supportingMedia": [{"type": "text/html", "value": "<p>Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in Erlang OTP <code>ssh</code> (<code>ssh_sftpd</code> module) allows an authenticated SFTP user to modify file attributes outside the configured chroot directory.</p>\n<p>The SFTP daemon (<code>ssh_sftpd</code>) stores the raw, user-supplied path in file handles instead of the chroot-resolved path. When <code>SSH_FXP_FSETSTAT</code> is issued on such a handle, file attributes (permissions, ownership, timestamps) are modified on the real filesystem path, bypassing the root directory boundary entirely.</p>\n<p>Any authenticated SFTP user on a server configured with the <code>root</code> option can modify file attributes of files outside the intended chroot boundary. The prerequisite is that a target file must exist on the real filesystem at the same relative path. Note that this vulnerability only allows modification of file attributes; file contents cannot be read or altered through this attack vector.</p>\n<p>If the SSH daemon runs as <code>root</code>, this enables direct privilege escalation: an attacker can set the setuid bit on any binary, change ownership of sensitive files, or make system configuration world-writable.</p>\n<p>This vulnerability is associated with program files <code>lib/ssh/src/ssh_sftpd.erl</code> and program routines <code>ssh_sftpd:do_open/4</code> and <code>ssh_sftpd:handle_op/4</code>.</p>\n<p>This issue affects OTP from OTP&nbsp;17.0 before OTP&nbsp;26.2.5.20, OTP&nbsp;27.3.4.11, and OTP&nbsp;28.4.3, corresponding to ssh from 3.0.1 before 5.1.4.15, 5.2.11.7, and 5.5.2. 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": "Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in Erlang OTP `ssh` (`ssh_sftpd` module) allows an authenticated SFTP user to modify file attributes outside the configured chroot directory.\n\nThe SFTP daemon (`ssh_sftpd`) stores the raw, user-supplied path in file handles instead of the chroot-resolved path. When `SSH_FXP_FSETSTAT` is issued on such a handle, file attributes (permissions, ownership, timestamps) are modified on the real filesystem path, bypassing the root directory boundary entirely.\n\nAny authenticated SFTP user on a server configured with the `root` option can modify file attributes of files outside the intended chroot boundary. The prerequisite is that a target file must exist on the real filesystem at the same relative path. Note that this vulnerability only allows modification of file attributes; file contents cannot be read or altered through this attack vector.\n\nIf the SSH daemon runs as `root`, this enables direct privilege escalation: an attacker can set the setuid bit on any binary, change ownership of sensitive files, or make system configuration world-writable.\n\nThis vulnerability is associated with program files `lib/ssh/src/ssh_sftpd.erl` and program routines `ssh_sftpd:do_open/4` and `ssh_sftpd:handle_op/4`.\n\nThis issue affects OTP from OTP\u00a017.0 before OTP\u00a026.2.5.20, OTP\u00a027.3.4.11, and OTP\u00a028.4.3, corresponding to ssh from 3.0.1 before 5.1.4.15, 5.2.11.7, and 5.5.2. 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-22", "description": "CWE-22 Improper Limitation of a Pathname to a Restricted Directory"}]}], "configurations": [{"lang": "en", "value": "The SFTP subsystem must be configured with the root option in ssh_sftpd:subsystem_spec/1. The root option is not set by default.", "supportingMedia": [{"type": "text/html", "value": "<p>The SFTP subsystem must be configured with the <code>root</code> option in <code>ssh_sftpd:subsystem_spec/1</code>. The <code>root</code> option is not set by default.</p>", "base64": false}, {"type": "text/markdown", "value": "The SFTP subsystem must be configured with the `root` option in `ssh_sftpd:subsystem_spec/1`. The `root` option is not set by default.", "base64": false}]}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "26.2.5.20"}, {"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "27.3.4.11", "versionStartIncluding": "27.0"}, {"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "28.4.3", "versionStartIncluding": "28.0"}], "operator": "OR"}], "operator": "AND"}], "providerMetadata": {"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "shortName": "EEF", "dateUpdated": "2026-11-11T19:21:07.336Z"}}}, "cveMetadata": {"cveId": "CVE-2026-32147", "state": "PUBLISHED", "dateUpdated": "2026-11-11T19:21:07.336Z", "dateReserved": "2026-03-10T22:37:29.213Z", "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "datePublished": "2026-04-21T12:01:20.350Z", "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:do_open/4"}, {"name": "ssh_sftpd:handle_op/4"}], "vendor": "Erlang", "versions": [{"changes": [{"at": "26.2.5.20", "status": "unaffected"}, {"at": "27.3.4.11", "status": "unaffected"}, {"at": "28.4.3", "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:do_open/4"}, {"name": "ssh_sftpd:handle_op/4"}], "repo": "https://github.com/erlang/otp", "vendor": "Erlang", "versions": [{"changes": [{"at": "5.1.4.15", "status": "unaffected"}, {"at": "5.2.11.7", "status": "unaffected"}, {"at": "5.5.2", "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:do_open/4"}, {"name": "ssh_sftpd:handle_op/4"}], "repo": "https://github.com/erlang/otp", "vendor": "Erlang", "versions": [{"lessThan": "28c5d5a6c5f873dc701b597276271763e7d1c004", "status": "affected", "version": "07b8f441ca711f9812fad9e9115bab3c3aa92f79", "versionType": "git"}, {"lessThan": "*", "status": "unaffected", "version": "28c5d5a6c5f873dc701b597276271763e7d1c004", "versionType": "git"}]}], "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*", "matchCriteriaId": "E37C60D4-5ECE-43AF-B778-AF1BA602B5F6", "versionEndExcluding": "26.2.5.20", "versionStartIncluding": "17.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*", "matchCriteriaId": "53AEBB75-1DCB-4B04-9FA5-2821679CFD52", "versionEndExcluding": "27.3.4.11", "versionStartIncluding": "27.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*", "matchCriteriaId": "D216AF1C-362E-4C48-B34E-64278BFBC676", "versionEndExcluding": "28.4.3", "versionStartIncluding": "28.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:erlang:erlang\\/ssh:*:*:*:*:*:*:*:*", "matchCriteriaId": "AEAA2DA5-E7F4-4C25-AABC-6DEDD0984AE5", "versionEndExcluding": "5.1.4.15", "versionStartIncluding": "3.0.1", "vulnerable": true}, {"criteria": "cpe:2.3:a:erlang:erlang\\/ssh:*:*:*:*:*:*:*:*", "matchCriteriaId": "55BBE15D-87F3-4922-AEB8-8A2CAFF0EA6E", "versionEndExcluding": "5.2.11.7", "versionStartIncluding": "5.2", "vulnerable": true}, {"criteria": "cpe:2.3:a:erlang:erlang\\/ssh:*:*:*:*:*:*:*:*", "matchCriteriaId": "964AE32A-19EB-4873-B4E1-E78B2DF3C628", "versionEndExcluding": "5.5.2", "versionStartIncluding": "5.5", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in Erlang OTP ssh (ssh_sftpd module) allows an authenticated SFTP user to modify file attributes outside the configured chroot directory.\n\nThe SFTP daemon (ssh_sftpd) stores the raw, user-supplied path in file handles instead of the chroot-resolved path. When SSH_FXP_FSETSTAT is issued on such a handle, file attributes (permissions, ownership, timestamps) are modified on the real filesystem path, bypassing the root directory boundary entirely.\n\nAny authenticated SFTP user on a server configured with the root option can modify file attributes of files outside the intended chroot boundary. The prerequisite is that a target file must exist on the real filesystem at the same relative path. Note that this vulnerability only allows modification of file attributes; file contents cannot be read or altered through this attack vector.\n\nIf the SSH daemon runs as root, this enables direct privilege escalation: an attacker can set the setuid bit on any binary, change ownership of sensitive files, or make system configuration world-writable.\n\nThis vulnerability is associated with program files lib/ssh/src/ssh_sftpd.erl and program routines ssh_sftpd:do_open/4 and ssh_sftpd:handle_op/4.\n\nThis issue affects OTP from OTP\u00a017.0 before OTP\u00a026.2.5.20, OTP\u00a027.3.4.11, and OTP\u00a028.4.3, corresponding to ssh from 3.0.1 before 5.1.4.15, 5.2.11.7, and 5.5.2. Whether OTP before OTP\u00a017.0, corresponding to ssh before 3.0.1, is affected is unknown."}, {"lang": "es", "value": "Una vulnerabilidad de Limitaci\u00f3n Incorrecta de un Nombre de Ruta a un Directorio Restringido (\u2019Salto de Ruta\u2019) en Erlang OTP ssh (m\u00f3dulo ssh_sftpd) permite a un usuario SFTP autenticado modificar atributos de archivo fuera del directorio chroot configurado.\n\nEl demonio SFTP (ssh_sftpd) almacena la ruta sin procesar, proporcionada por el usuario, en descriptores de archivo en lugar de la ruta resuelta por chroot. Cuando SSH_FXP_FSETSTAT se emite en dicho descriptor, los atributos de archivo (permisos, propiedad, marcas de tiempo) se modifican en la ruta real del sistema de archivos, eludiendo por completo el l\u00edmite del directorio ra\u00edz.\n\nCualquier usuario SFTP autenticado en un servidor configurado con la opci\u00f3n root puede modificar atributos de archivo de archivos fuera del l\u00edmite chroot previsto. El requisito previo es que un archivo de destino debe existir en el sistema de archivos real en la misma ruta relativa. Tenga en cuenta que esta vulnerabilidad solo permite la modificaci\u00f3n de atributos de archivo; el contenido de los archivos no puede ser le\u00eddo o alterado a trav\u00e9s de este vector de ataque.\n\nSi el demonio SSH se ejecuta como root, esto permite una escalada de privilegios directa: un atacante puede establecer el bit setuid en cualquier binario, cambiar la propiedad de archivos sensibles o hacer que la configuraci\u00f3n del sistema sea de escritura global.\n\nEsta vulnerabilidad est\u00e1 asociada con los archivos de programa lib/ssh/src/ssh_sftpd.erl y las rutinas de programa ssh_sftpd:do_open/4 y ssh_sftpd:handle_op/4.\n\nEste problema afecta a OTP desde OTP 17.0 hasta OTP 28.4.3, 27.3.4.11 y 26.2.5.20 correspondiente a ssh desde 3.01 hasta 5.5.3, 5.2.11.7 y 5.1.4.15."}], "id": "CVE-2026-32147", "lastModified": "2026-11-11T20:17:09.550", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 1.4, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 5.3, "baseSeverity": "MEDIUM", "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": "LOW", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/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": "NONE", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-32147", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-04-21T13:11:06.946869Z", "version": "2.0.3"}}]}, "published": "2026-04-21T12:15:58.800", "references": [{"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "tags": ["Vendor Advisory"], "url": "https://cna.erlef.org/cves/CVE-2026-32147.html"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://github.com/erlang/otp/commit/07b8f441ca711f9812fad9e9115bab3c3aa92f79"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "tags": ["Patch"], "url": "https://github.com/erlang/otp/commit/28c5d5a6c5f873dc701b597276271763e7d1c004"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "tags": ["Vendor Advisory"], "url": "https://github.com/erlang/otp/security/advisories/GHSA-28jg-mw9x-hpm5"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "tags": ["Third Party Advisory"], "url": "https://osv.dev/vulnerability/EEF-CVE-2026-32147"}, {"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-22"}], "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "type": "Secondary"}]}

{}

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