Bug 2528457

Summary:	CVE-2026-85396 rubygem-rubyzip: rubyzip: Arbitrary file write via path traversal [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Marian Rehak <mrehak>
Component:	rubygem-rubyzip	Assignee:	Vít Ondruch <vondruch>
Status:	NEW ---	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	high	Docs Contact:
Priority:	high
Version:	rawhide	CC:	clalancette, ruby-packagers-sig, vondruch
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["e24cb521-61e7-4f33-ba32-0edeedb16212"]}
Fixed In Version:		Doc Type:	---
Doc Text:		Story Points:	---
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Documentation:	---	CRM:
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2528185

Description Marian Rehak 2026-09-04 10:08:50 UTC

Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

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.