EEF-CVE-2026-47078
- Source
- https://cna.erlef.org/osv/EEF-CVE-2026-47078.html
- Import Source
- https://cna.erlef.org/osv/EEF-CVE-2026-47078.json
- JSON Data
- https://api.osv.dev/v1/vulns/EEF-CVE-2026-47078
- Aliases
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- CVE-2026-47078
- GHSA-rf72-wp7h-jg3x
- Published
- 2026-07-27T15:03:50Z
- Modified
- 2026-07-30T18:22:12Z
- Severity
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- 4.8 (Medium) CVSS_V4 - 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 CVSS Calculator
- Summary
- Relative path traversal in zip:unzip/zip:extract via check_dir_level depth-counter bypass
- Details
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Summary
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.
- Database specific
{ "capec_ids": [ "CAPEC-139" ], "cpe_ids": [ "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*" ], "cwe_ids": [ "CWE-23" ] }- References
- Credits
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- Jonatan Männchen - FINDER
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- Zhang Delong - FINDER
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- John Högberg - REMEDIATION_DEVELOPER
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