HIGH7.5

GHSA-47m2-wp7j-p9vc

rubyzip path traversal vulnerability

Quick fix

GHSA-47m2-wp7j-p9vc — rubyzip: upgrade to the fixed version with the command below.

bundle update rubyzip

Details

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.

Are you affected?

Enter the version of the package you're using.

Affected packages

RubyGems/rubyzip

Introduced in: 0Fixed in: 3.4.0

Fixbundle update rubyzip

References

https://nvd.nist.gov/vuln/detail/CVE-2026-85396[ADVISORY]
https://github.com/rubyzip/rubyzip/commit/17edfbf4423b83211b075acc23a7d8640da63449[WEB]
https://github.com/geo-chen/oss/blob/main/rubyzip.md[WEB]
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rubyzip/CVE-2026-85396.yml[WEB]
https://github.com/rubyzip/rubyzip[PACKAGE]
https://github.com/rubyzip/rubyzip/blob/v3.3.1/lib/zip/entry.rb[WEB]
https://github.com/rubyzip/rubyzip/releases/tag/v3.4.0[WEB]
https://www.vulncheck.com/advisories/rubyzip-before-3.4.0-path-traversal-in-zip-entry-extract-via-sibling-directory-prefix[WEB]