{"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": "2026-07-27T18:38:54.420Z"}, "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 M\u00e4nnchen"}, {"lang": "en", "type": "finder", "value": "Zhang Delong"}, {"lang": "en", "type": "remediation developer", "value": "John H\u00f6gberg"}], "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.<p><tt>zip:unzip/1,2</tt> and <tt>zip:extract/1,2</tt> validate entry paths using <tt>zip:check_dir_level/2</tt>, which tracks directory depth as a running integer counter: <tt>..</tt> 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 <tt>../x/y</tt> 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 <tt>add_cwd</tt>.</p><p>This vulnerability is associated with program file <tt>lib/stdlib/src/zip.erl</tt>.</p><p>This issue affects OTP from OTP 27.1 before OTP&nbsp;29.0.4, OTP&nbsp;28.5.0.4 and OTP&nbsp;27.3.4.15, corresponding to stdlib from 6.1 before 8.0.3, 7.3.0.1 and 6.2.2.4.</p>"}], "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\u00a029.0.4, OTP\u00a028.5.0.4 and OTP\u00a027.3.4.15, 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": "2026-07-27T16:10:02.280Z"}, "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"}}]}}

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{"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": "2026-07-27T17:30:17.164279+00:00", "vendors": ["erlang", "erlang$PRODUCT$erlang/otp"]}