CVE-2026-85396
highrubyzip versions before 3.4.0 contain a path traversal vulnerability in Zip::Entry#extract that fails to properly validate extraction paths using prefix compar…
rubyzip versions before 3.4.0 contain a path traversal vulnerability in Zip::Entry#extract that fails to properly validate extraction paths using prefix comparison without trailing separators. Attackers can craft archive entries with names like ../upload_backup/owned.sh to write files outside the intended extraction directory into sibling paths sharing the destination prefix.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/geo-chen/oss/blob/main/rubyzip.md disclosure@vulncheck.com
- https://github.com/rubyzip/rubyzip disclosure@vulncheck.com
- https://github.com/rubyzip/rubyzip/blob/v3.3.1/lib/zip/entry.rb disclosure@vulncheck.com
- https://github.com/rubyzip/rubyzip/commit/17edfbf4423b83211b075acc23a7d8640da63449 disclosure@vulncheck.com
- https://github.com/rubyzip/rubyzip/releases/tag/v3.4.0 disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/rubyzip-before-3.4.0-path-traversal-in-zip-entry-extr... disclosure@vulncheck.com