{ "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": "2026-07-28T09:53:55.522Z" }, "containers": { "cna": { "affected": [ { "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%20https:%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": "8.0.3", "status": "unaffected" }, { "at": "7.3.0.1", "status": "unaffected" }, { "at": "6.2.2.4", "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": [ { "changes": [ { "at": "29.0.4", "status": "unaffected" }, { "at": "28.5.0.4", "status": "unaffected" }, { "at": "27.3.4.15", "status": "unaffected" } ], "lessThan": "*", "status": "affected", "version": "27.1", "versionType": "otp" }, { "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 Männchen" }, { "lang": "en", "type": "finder", "value": "Zhang Delong" }, { "lang": "en", "type": "remediation developer", "value": "John Högberg" } ], "descriptions": [ { "lang": "en", "supportingMedia": [ { "base64": false, "type": "text/html", "value": "Relative Path Traversal vulnerability in Erlang OTP (stdlib zip module) allows writing files outside the intended extraction directory via a crafted zip archive.

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.

This vulnerability is associated with program file lib/stdlib/src/zip.erl.

This issue affects OTP from OTP 27.1 before OTP 29.0.4, OTP 28.5.0.4 and OTP 27.3.4.15, corresponding to stdlib from 6.1 before 8.0.3, 7.3.0.1 and 6.2.2.4.

" } ], "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 27.1 before OTP 29.0.4, OTP 28.5.0.4 and OTP 27.3.4.15, corresponding to stdlib from 6.1 before 8.0.3, 7.3.0.1 and 6.2.2.4." } ], "impacts": [ { "capecId": "CAPEC-139", "descriptions": [ { "lang": "en", "value": "CAPEC-139 Relative Path Traversal" } ] } ], "metrics": [ { "cvssV4_0": { "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "LOCAL", "baseScore": 4.8, "baseSeverity": "MEDIUM", "privilegesRequired": "NONE", "subAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "LOW", "userInteraction": "PASSIVE", "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" }, "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": "2026-07-28T09:53:55.522Z" }, "references": [ { "tags": [ "vendor-advisory", "related" ], "url": "https://github.com/erlang/otp/security/advisories/GHSA-rf72-wp7h-jg3x" }, { "tags": [ "related" ], "url": "https://cna.erlef.org/cves/CVE-2026-47078.html" }, { "tags": [ "related" ], "url": "https://osv.dev/vulnerability/EEF-CVE-2026-47078" }, { "tags": [ "x_version-scheme" ], "url": "https://www.erlang.org/doc/system/versions.html#order-of-versions" }, { "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", "x_generator": { "engine": "cvelib 1.8.0" } }, "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" } } ] } }