CVE-2026-47078

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-47078", "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "state": "PUBLISHED", "assignerShortName": "EEF", "dateReserved": "2026-05-18T17:28:10.319Z", "datePublished": "2026-07-27T15:03:50.929Z", "dateUpdated": "2026-09-24T20:48:37.203Z"}, "containers": {"cna": {"affected": [{"cpes": ["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "modules": ["zip"], "packageName": "otp", "packageURL": "pkg:software-id/erlang.org/otp", "product": "OTP", "programFiles": ["lib/stdlib/src/zip.erl"], "programRoutines": [{"name": "zip:unzip/1"}, {"name": "zip:unzip/2"}, {"name": "zip:extract/1"}, {"name": "zip:extract/2"}, {"name": "zip:check_dir_level/2"}], "vendor": "Erlang", "versions": [{"changes": [{"at": "27.3.4.15", "status": "unaffected"}, {"at": "28.5.0.4", "status": "unaffected"}, {"at": "29.0.4", "status": "unaffected"}], "lessThan": "*", "status": "affected", "version": "27.1", "versionType": "otp"}]}, {"cpes": ["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "modules": ["zip"], "packageName": "stdlib", "packageURL": "pkg:otp/stdlib?repository_url=https:%2F%2Fgithub.com%2Ferlang%2Fotp&vcs_url=git%2Bhttps:%2F%2Fgithub.com%2Ferlang%2Fotp.git", "product": "OTP", "programFiles": ["src/zip.erl"], "programRoutines": [{"name": "zip:unzip/1"}, {"name": "zip:unzip/2"}, {"name": "zip:extract/1"}, {"name": "zip:extract/2"}, {"name": "zip:check_dir_level/2"}], "repo": "https://github.com/erlang/otp", "vendor": "Erlang", "versions": [{"changes": [{"at": "6.2.2.4", "status": "unaffected"}, {"at": "7.3.0.1", "status": "unaffected"}, {"at": "8.0.3", "status": "unaffected"}], "lessThan": "*", "status": "affected", "version": "6.1", "versionType": "otp"}]}, {"collectionURL": "https://github.com", "cpes": ["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "modules": ["zip"], "packageName": "erlang/otp", "packageURL": "pkg:github/erlang/otp", "product": "OTP", "programFiles": ["lib/stdlib/src/zip.erl"], "programRoutines": [{"name": "zip:unzip/1"}, {"name": "zip:unzip/2"}, {"name": "zip:extract/1"}, {"name": "zip:extract/2"}, {"name": "zip:check_dir_level/2"}], "repo": "https://github.com/erlang/otp", "vendor": "Erlang", "versions": [{"lessThan": "8a933c9c7835b06776d31d17b79b7336627d887a", "status": "affected", "version": "8d537f51a4262d24f3395c4148323eaca9facbbd", "versionType": "git"}]}], "cpeApplicability": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*", "versionEndExcluding": "27.3.4.15", "versionStartIncluding": "27.1", "vulnerable": true}, {"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*", "versionEndExcluding": "28.5.0.4", "versionStartIncluding": "28.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*", "versionEndExcluding": "29.0.4", "versionStartIncluding": "29.0", "vulnerable": true}], "negate": false, "operator": "OR"}], "operator": "AND"}], "credits": [{"lang": "en", "type": "finder", "value": "Jonatan M\u00e4nnchen / EEF"}, {"lang": "en", "type": "finder", "value": "Zhang Delong"}, {"lang": "en", "type": "remediation developer", "value": "John H\u00f6gberg"}], "datePublic": "2026-07-27T15:03:50.000Z", "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>Relative Path Traversal vulnerability in Erlang OTP (stdlib zip module) allows writing files outside the intended extraction directory via a crafted zip archive.</p>\n<p><code>zip:unzip/1,2</code> and <code>zip:extract/1,2</code> validate entry paths using <code>zip:check_dir_level/2</code>, which tracks directory depth as a running integer counter: <code>..</code> decrements it, normal path components increment it. The caller rejects only paths where the final counter value is less than zero. A path such as <code>../x/y</code> causes the counter to go negative mid-traversal then recover to zero, passing validation while resolving to a location outside the extraction directory when joined with the current working directory via <code>add_cwd</code>.</p>\n<p>This vulnerability is associated with program file <code>lib/stdlib/src/zip.erl</code>.</p>\n<p>This issue affects OTP from OTP&nbsp;27.1 before OTP&nbsp;27.3.4.15, OTP&nbsp;28.5.0.4, and OTP&nbsp;29.0.4, corresponding to stdlib from 6.1 before 6.2.2.4, 7.3.0.1, and 8.0.3.</p>"}, {"base64": false, "type": "text/markdown", "value": "Relative Path Traversal vulnerability in Erlang OTP (stdlib zip module) allows writing files outside the intended extraction directory via a crafted zip archive.\n\n`zip:unzip/1,2` and `zip:extract/1,2` validate entry paths using `zip:check_dir_level/2`, which tracks directory depth as a running integer counter: `..` decrements it, normal path components increment it. The caller rejects only paths where the final counter value is less than zero. A path such as `../x/y` causes the counter to go negative mid-traversal then recover to zero, passing validation while resolving to a location outside the extraction directory when joined with the current working directory via `add_cwd`.\n\nThis vulnerability is associated with program file `lib/stdlib/src/zip.erl`.\n\nThis issue affects OTP from OTP\u00a027.1 before OTP\u00a027.3.4.15, OTP\u00a028.5.0.4, and OTP\u00a029.0.4, corresponding to stdlib from 6.1 before 6.2.2.4, 7.3.0.1, and 8.0.3."}], "value": "Relative Path Traversal vulnerability in Erlang OTP (stdlib zip module) allows writing files outside the intended extraction directory via a crafted zip archive.\n\nzip:unzip/1,2 and zip:extract/1,2 validate entry paths using zip:check_dir_level/2, which tracks directory depth as a running integer counter: .. decrements it, normal path components increment it. The caller rejects only paths where the final counter value is less than zero. A path such as ../x/y causes the counter to go negative mid-traversal then recover to zero, passing validation while resolving to a location outside the extraction directory when joined with the current working directory via add_cwd.\n\nThis vulnerability is associated with program file lib/stdlib/src/zip.erl.\n\nThis issue affects OTP from OTP\u00a027.1 before OTP\u00a027.3.4.15, OTP\u00a028.5.0.4, and OTP\u00a029.0.4, corresponding to stdlib from 6.1 before 6.2.2.4, 7.3.0.1, and 8.0.3."}], "impacts": [{"capecId": "CAPEC-139", "descriptions": [{"lang": "en", "value": "CAPEC-139 Relative Path Traversal"}]}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "LOCAL", "baseScore": 4.8, "baseSeverity": "MEDIUM", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "LOW", "userInteraction": "PASSIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:L/SC:N/SI:L/SA:L", "version": "4.0", "vulnAvailabilityImpact": "LOW", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-23", "description": "CWE-23 Relative Path Traversal", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "shortName": "EEF", "dateUpdated": "2026-09-24T20:48:37.203Z"}, "references": [{"tags": ["vendor-advisory", "related"], "url": "https://github.com/erlang/otp/security/advisories/GHSA-rf72-wp7h-jg3x"}, {"name": "EEF CNA record for CVE-2026-47078", "tags": ["related"], "url": "https://cna.erlef.org/cves/CVE-2026-47078.html"}, {"name": "OSV record EEF-CVE-2026-47078", "tags": ["related"], "url": "https://osv.dev/vulnerability/EEF-CVE-2026-47078"}, {"name": "Erlang/OTP version ordering", "tags": ["x_version-scheme"], "url": "https://www.erlang.org/doc/system/versions.html#order-of-versions"}, {"name": "Introducing commit 8d537f5 in erlang/otp", "tags": ["related"], "url": "https://github.com/erlang/otp/commit/8d537f51a4262d24f3395c4148323eaca9facbbd"}, {"name": "Fix commit 8a933c9 in erlang/otp", "tags": ["patch"], "url": "https://github.com/erlang/otp/commit/8a933c9c7835b06776d31d17b79b7336627d887a"}], "source": {"discovery": "EXTERNAL"}, "title": "Relative path traversal in zip:unzip/zip:extract via check_dir_level depth-counter bypass"}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-07-27T18:38:46.508080Z", "id": "CVE-2026-47078", "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": "2026-07-27T18:38:54.420Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-47078", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-27T18:38:46.508080Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-27T18:38:50.891Z"}}], "cna": {"title": "Relative path traversal in zip:unzip/zip:extract via check_dir_level depth-counter bypass", "source": {"discovery": "EXTERNAL"}, "credits": [{"lang": "en", "type": "finder", "value": "Jonatan M\u00e4nnchen / EEF"}, {"lang": "en", "type": "finder", "value": "Zhang Delong"}, {"lang": "en", "type": "remediation developer", "value": "John H\u00f6gberg"}], "impacts": [{"capecId": "CAPEC-139", "descriptions": [{"lang": "en", "value": "CAPEC-139 Relative Path Traversal"}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 4.8, "Automatable": "NOT_DEFINED", "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:L/SC:N/SI:L/SA:L", "providerUrgency": "NOT_DEFINED", "userInteraction": "PASSIVE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "LOW", "vulnIntegrityImpact": "LOW", "subAvailabilityImpact": "LOW", "vulnAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"cpes": ["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"], "vendor": "Erlang", "modules": ["zip"], "product": "OTP", "versions": [{"status": "affected", "changes": [{"at": "27.3.4.15", "status": "unaffected"}, {"at": "28.5.0.4", "status": "unaffected"}, {"at": "29.0.4", "status": "unaffected"}], "version": "27.1", "lessThan": "*", "versionType": "otp"}], "packageURL": "pkg:software-id/erlang.org/otp", "packageName": "otp", "programFiles": ["lib/stdlib/src/zip.erl"], "defaultStatus": "unaffected", "programRoutines": [{"name": "zip:unzip/1"}, {"name": "zip:unzip/2"}, {"name": "zip:extract/1"}, {"name": "zip:extract/2"}, {"name": "zip:check_dir_level/2"}]}, {"cpes": ["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"], "repo": "https://github.com/erlang/otp", "vendor": "Erlang", "modules": ["zip"], "product": "OTP", "versions": [{"status": "affected", "changes": [{"at": "6.2.2.4", "status": "unaffected"}, {"at": "7.3.0.1", "status": "unaffected"}, {"at": "8.0.3", "status": "unaffected"}], "version": "6.1", "lessThan": "*", "versionType": "otp"}], "packageURL": "pkg:otp/stdlib?repository_url=https:%2F%2Fgithub.com%2Ferlang%2Fotp&vcs_url=git%2Bhttps:%2F%2Fgithub.com%2Ferlang%2Fotp.git", "packageName": "stdlib", "programFiles": ["src/zip.erl"], "defaultStatus": "unaffected", "programRoutines": [{"name": "zip:unzip/1"}, {"name": "zip:unzip/2"}, {"name": "zip:extract/1"}, {"name": "zip:extract/2"}, {"name": "zip:check_dir_level/2"}]}, {"cpes": ["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"], "repo": "https://github.com/erlang/otp", "vendor": "Erlang", "modules": ["zip"], "product": "OTP", "versions": [{"status": "affected", "version": "8d537f51a4262d24f3395c4148323eaca9facbbd", "lessThan": "8a933c9c7835b06776d31d17b79b7336627d887a", "versionType": "git"}], "packageURL": "pkg:github/erlang/otp", "packageName": "erlang/otp", "programFiles": ["lib/stdlib/src/zip.erl"], "collectionURL": "https://github.com", "defaultStatus": "unaffected", "programRoutines": [{"name": "zip:unzip/1"}, {"name": "zip:unzip/2"}, {"name": "zip:extract/1"}, {"name": "zip:extract/2"}, {"name": "zip:check_dir_level/2"}]}], "datePublic": "2026-07-27T15:03:50.000Z", "references": [{"url": "https://github.com/erlang/otp/security/advisories/GHSA-rf72-wp7h-jg3x", "tags": ["vendor-advisory", "related"]}, {"url": "https://cna.erlef.org/cves/CVE-2026-47078.html", "name": "EEF CNA record for CVE-2026-47078", "tags": ["related"]}, {"url": "https://osv.dev/vulnerability/EEF-CVE-2026-47078", "name": "OSV record EEF-CVE-2026-47078", "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/8d537f51a4262d24f3395c4148323eaca9facbbd", "name": "Introducing commit 8d537f5 in erlang/otp", "tags": ["related"]}, {"url": "https://github.com/erlang/otp/commit/8a933c9c7835b06776d31d17b79b7336627d887a", "name": "Fix commit 8a933c9 in erlang/otp", "tags": ["patch"]}], "descriptions": [{"lang": "en", "value": "Relative Path Traversal vulnerability in Erlang OTP (stdlib zip module) allows writing files outside the intended extraction directory via a crafted zip archive.\n\nzip:unzip/1,2 and zip:extract/1,2 validate entry paths using zip:check_dir_level/2, which tracks directory depth as a running integer counter: .. decrements it, normal path components increment it. The caller rejects only paths where the final counter value is less than zero. A path such as ../x/y causes the counter to go negative mid-traversal then recover to zero, passing validation while resolving to a location outside the extraction directory when joined with the current working directory via add_cwd.\n\nThis vulnerability is associated with program file lib/stdlib/src/zip.erl.\n\nThis issue affects OTP from OTP\u00a027.1 before OTP\u00a027.3.4.15, OTP\u00a028.5.0.4, and OTP\u00a029.0.4, corresponding to stdlib from 6.1 before 6.2.2.4, 7.3.0.1, and 8.0.3.", "supportingMedia": [{"type": "text/html", "value": "<p>Relative Path Traversal vulnerability in Erlang OTP (stdlib zip module) allows writing files outside the intended extraction directory via a crafted zip archive.</p>\n<p><code>zip:unzip/1,2</code> and <code>zip:extract/1,2</code> validate entry paths using <code>zip:check_dir_level/2</code>, which tracks directory depth as a running integer counter: <code>..</code> decrements it, normal path components increment it. The caller rejects only paths where the final counter value is less than zero. A path such as <code>../x/y</code> causes the counter to go negative mid-traversal then recover to zero, passing validation while resolving to a location outside the extraction directory when joined with the current working directory via <code>add_cwd</code>.</p>\n<p>This vulnerability is associated with program file <code>lib/stdlib/src/zip.erl</code>.</p>\n<p>This issue affects OTP from OTP&nbsp;27.1 before OTP&nbsp;27.3.4.15, OTP&nbsp;28.5.0.4, and OTP&nbsp;29.0.4, corresponding to stdlib from 6.1 before 6.2.2.4, 7.3.0.1, and 8.0.3.</p>", "base64": false}, {"type": "text/markdown", "value": "Relative Path Traversal vulnerability in Erlang OTP (stdlib zip module) allows writing files outside the intended extraction directory via a crafted zip archive.\n\n`zip:unzip/1,2` and `zip:extract/1,2` validate entry paths using `zip:check_dir_level/2`, which tracks directory depth as a running integer counter: `..` decrements it, normal path components increment it. The caller rejects only paths where the final counter value is less than zero. A path such as `../x/y` causes the counter to go negative mid-traversal then recover to zero, passing validation while resolving to a location outside the extraction directory when joined with the current working directory via `add_cwd`.\n\nThis vulnerability is associated with program file `lib/stdlib/src/zip.erl`.\n\nThis issue affects OTP from OTP\u00a027.1 before OTP\u00a027.3.4.15, OTP\u00a028.5.0.4, and OTP\u00a029.0.4, corresponding to stdlib from 6.1 before 6.2.2.4, 7.3.0.1, and 8.0.3.", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-23", "description": "CWE-23 Relative Path Traversal"}]}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "27.3.4.15", "versionStartIncluding": "27.1"}, {"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "28.5.0.4", "versionStartIncluding": "28.0"}, {"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "29.0.4", "versionStartIncluding": "29.0"}], "operator": "OR"}], "operator": "AND"}], "providerMetadata": {"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "shortName": "EEF", "dateUpdated": "2026-09-24T20:48:37.203Z"}}}, "cveMetadata": {"cveId": "CVE-2026-47078", "state": "PUBLISHED", "dateUpdated": "2026-09-24T20:48:37.203Z", "dateReserved": "2026-05-18T17:28:10.319Z", "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "datePublished": "2026-07-27T15:03:50.929Z", "assignerShortName": "EEF"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"cpes": ["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "modules": ["zip"], "packageName": "otp", "packageURL": "pkg:software-id/erlang.org/otp", "product": "OTP", "programFiles": ["lib/stdlib/src/zip.erl"], "programRoutines": [{"name": "zip:unzip/1"}, {"name": "zip:unzip/2"}, {"name": "zip:extract/1"}, {"name": "zip:extract/2"}, {"name": "zip:check_dir_level/2"}], "vendor": "Erlang", "versions": [{"changes": [{"at": "27.3.4.15", "status": "unaffected"}, {"at": "28.5.0.4", "status": "unaffected"}, {"at": "29.0.4", "status": "unaffected"}], "lessThan": "*", "status": "affected", "version": "27.1", "versionType": "otp"}]}, {"cpes": ["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "modules": ["zip"], "packageName": "stdlib", "packageURL": "pkg:otp/stdlib?repository_url=https:%2F%2Fgithub.com%2Ferlang%2Fotp&vcs_url=git%2Bhttps:%2F%2Fgithub.com%2Ferlang%2Fotp.git", "product": "OTP", "programFiles": ["src/zip.erl"], "programRoutines": [{"name": "zip:unzip/1"}, {"name": "zip:unzip/2"}, {"name": "zip:extract/1"}, {"name": "zip:extract/2"}, {"name": "zip:check_dir_level/2"}], "repo": "https://github.com/erlang/otp", "vendor": "Erlang", "versions": [{"changes": [{"at": "6.2.2.4", "status": "unaffected"}, {"at": "7.3.0.1", "status": "unaffected"}, {"at": "8.0.3", "status": "unaffected"}], "lessThan": "*", "status": "affected", "version": "6.1", "versionType": "otp"}]}, {"collectionURL": "https://github.com", "cpes": ["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "modules": ["zip"], "packageName": "erlang/otp", "packageURL": "pkg:github/erlang/otp", "product": "OTP", "programFiles": ["lib/stdlib/src/zip.erl"], "programRoutines": [{"name": "zip:unzip/1"}, {"name": "zip:unzip/2"}, {"name": "zip:extract/1"}, {"name": "zip:extract/2"}, {"name": "zip:check_dir_level/2"}], "repo": "https://github.com/erlang/otp", "vendor": "Erlang", "versions": [{"lessThan": "8a933c9c7835b06776d31d17b79b7336627d887a", "status": "affected", "version": "8d537f51a4262d24f3395c4148323eaca9facbbd", "versionType": "git"}]}], "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Relative Path Traversal vulnerability in Erlang OTP (stdlib zip module) allows writing files outside the intended extraction directory via a crafted zip archive.\n\nzip:unzip/1,2 and zip:extract/1,2 validate entry paths using zip:check_dir_level/2, which tracks directory depth as a running integer counter: .. decrements it, normal path components increment it. The caller rejects only paths where the final counter value is less than zero. A path such as ../x/y causes the counter to go negative mid-traversal then recover to zero, passing validation while resolving to a location outside the extraction directory when joined with the current working directory via add_cwd.\n\nThis vulnerability is associated with program file lib/stdlib/src/zip.erl.\n\nThis issue affects OTP from OTP\u00a027.1 before OTP\u00a027.3.4.15, OTP\u00a028.5.0.4, and OTP\u00a029.0.4, corresponding to stdlib from 6.1 before 6.2.2.4, 7.3.0.1, and 8.0.3."}, {"lang": "es", "value": "Vulnerabilidad de salto de ruta relativo en Erlang OTP (m\u00f3dulo zip de stdlib) permite escribir archivos fuera del directorio de extracci\u00f3n previsto mediante un archivo zip manipulado.\n\nzip:unzip/1,2 y zip:extract/1,2 validan las rutas de entrada usando zip:check_dir_level/2, que rastrea la profundidad del directorio como un contador entero en ejecuci\u00f3n: .. lo decrementa, los componentes de ruta normales lo incrementan. El llamador rechaza solo las rutas donde el valor final del contador es menor que cero. Una ruta como .. / x/y hace que el contador se vuelva negativo a mitad del recorrido y luego se recupere a cero, pasando la validaci\u00f3n mientras se resuelve a una ubicaci\u00f3n fuera del directorio de extracci\u00f3n cuando se une con el directorio de trabajo actual a trav\u00e9s de add_cwd.\n\nEsta vulnerabilidad est\u00e1 asociada con el archivo de programa lib/stdlib/src/zip.erl.\n\nEste problema afecta a OTP desde OTP 27.1 antes de OTP 29.0.4, OTP 28.5.0.4 y OTP 27.3.4.15, correspondiendo a stdlib desde 6.1 antes de 8.0.3, 7.3.0.1 y 6.2.2.4."}], "id": "CVE-2026-47078", "lastModified": "2026-10-24T13:10:00.147", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "LOCAL", "availabilityRequirement": "NOT_DEFINED", "baseScore": 4.8, "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": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "LOW", "userInteraction": "PASSIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:L/SC:N/SI:L/SA:L/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": "LOW", "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-2026-47078", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-07-27T18:38:46.508080Z", "version": "2.0.3"}}]}, "published": "2026-07-27T16:17:07.643", "references": [{"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://cna.erlef.org/cves/CVE-2026-47078.html"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://github.com/erlang/otp/commit/8a933c9c7835b06776d31d17b79b7336627d887a"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://github.com/erlang/otp/commit/8d537f51a4262d24f3395c4148323eaca9facbbd"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://github.com/erlang/otp/security/advisories/GHSA-rf72-wp7h-jg3x"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://osv.dev/vulnerability/EEF-CVE-2026-47078"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://www.erlang.org/doc/system/versions.html#order-of-versions"}], "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-23"}], "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "type": "Secondary"}]}

{"bugzilla": {"description": "otp: Erlang OTP: Arbitrary file write via relative path traversal in zip module", "id": "2507547", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507547"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L", "status": "draft"}, "cwe": "CWE-22", "details": ["A flaw was found in the Erlang OTP stdlib zip module. The zip:unzip and zip:extract functions, which handle archive extraction, are vulnerable to a relative path traversal attack. A remote attacker could craft a malicious zip archive containing specially formed entry names. When processed, this could allow the attacker to write arbitrary files outside the intended extraction directory, potentially leading to remote code execution or data corruption."], "name": "CVE-2026-47078", "package_state": [{"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "package_name": "erlang27", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:openstack:16.2", "fix_state": "Not affected", "package_name": "erlang", "product_name": "Red Hat OpenStack Platform 16.2"}, {"cpe": "cpe:/a:redhat:openstack:17.1", "fix_state": "Not affected", "package_name": "erlang", "product_name": "Red Hat OpenStack Platform 17.1"}, {"cpe": "cpe:/a:redhat:openstack:18.0", "fix_state": "Not affected", "package_name": "erlang", "product_name": "Red Hat OpenStack Platform 18.0"}], "public_date": "2026-07-27T15:03:50Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-47078\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-47078\nhttps://cna.erlef.org/cves/CVE-2026-47078.html\nhttps://github.com/erlang/otp/commit/8a933c9c7835b06776d31d17b79b7336627d887a\nhttps://github.com/erlang/otp/security/advisories/GHSA-rf72-wp7h-jg3x\nhttps://osv.dev/vulnerability/EEF-CVE-2026-47078\nhttps://www.erlang.org/doc/system/versions.html#order-of-versions"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[6.1,*]"}}], "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": "[27.1,*]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8d537f51a4262d24f3395c4148323eaca9facbbd,8a933c9c7835b06776d31d17b79b7336627d887a)"}}], "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"}], "created": "2026-07-27T17:30:17.164238+00:00", "updated": "2026-09-26T06:45:06.133131+00:00", "vendors": ["erlang", "erlang$PRODUCT$erlang/otp"]}