Bug 2528185 (CVE-2026-85396) - CVE-2026-85396 rubyzip: rubyzip: Arbitrary file write via path traversal
Summary: CVE-2026-85396 rubyzip: rubyzip: Arbitrary file write via path traversal
Keywords:
Status: NEW
Alias: CVE-2026-85396
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2528457
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-03 19:02 UTC by OSIDB Bzimport
Modified: 2026-09-04 10:08 UTC (History)
7 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2026-09-03 19:02:53 UTC 
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.
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