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  4. CVE 2026 85396 rubyzip before 340 path traversal in
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Back to active CVEs
High · CVSS 7.5CVE-2026-85396GHSA-47M2-WP7J-P9VC

rubyzip before 3.4.0 Path Traversal in Zip::Entry#extract via Sibling-Directory PrefixCVE-2026-85396

Answer in brief

CVE-2026-85396 records a High severity (CVSS 7.5) vulnerability in rubyzip before 3.4.0 Path Traversal in Zip::Entry#extract via Sibling-Directory Prefix. The current sources do not mark it as known exploited. The current feed maps rubyzip/rubyzip (generic), rubyzip (rubygems), rubyzip (rubygems). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 3, 2026Updated Sep 25, 2026Source checked Oct 19, 2026First seen by HOL Sep 3, 2026Material review Sep 25, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.5
Exploitation
Not marked as known exploited
Affected software
3 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps rubyzip/rubyzip (generic), rubyzip (rubygems), rubyzip (rubygems). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
rubyzip/rubyzipgeneric>=0 <3.4.03.4.0
rubyziprubygems<3.4.03.4.0
rubyziprubygems>=0 <3.4.03.4.0

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for rubyzip/rubyzip, rubyzip, rubyzip.
  2. 2Review the reported fix. Update rubyzip/rubyzip to 3.4.0; rubyzip to 3.4.0; rubyzip to 3.4.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Sep 3, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 25, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 3, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • Source referencevulncheck.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • NVD vulnerability recordnvd.nist.gov
Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

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  • Gitea panic on the repositories route of individual usersSame generic ecosystem
  • Gitea Actions artifact v4 API unbounded request bodySame generic ecosystem
  • Gitea cross-site request forgery on repository topicsSame generic ecosystem
  • Gitea reactions accepted on locked issues and commentsSame generic ecosystem

Record context

Vulnerability class
Path Traversal
EPSS
Not reported
CWE IDs
CWE-22
Source
CVE List V5
Source checked
Oct 19, 2026
References
9 linked sources
Open source record