All vulnerabilities

CVE-2025-59343

tar-fs has a symlink validation bypass if destination directory is predictable with a specific tarball

Description

Impact

v3.1.0, v2.1.3, v1.16.5 and below

Patches

Has been patched in 3.1.1, 2.1.4, and 1.16.6

Workarounds

You can use the ignore option to ignore non files/directories.

  ignore (_, header) {
    // pass files & directories, ignore e.g. symlinks
    return header.type !== 'file' && header.type !== 'directory'
  }

Credit

Reported by: Mapta / BugBunny_ai

Patch Available

Fix available through Seal Security. 

No upgrade required, protect your application instantly.

Fix without upgrading
Score
8.7
Severity
High
Ecosystem
JavaScript
Publish Date
September 24, 2025
Modified Date
February 3, 2026
Score Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Affected Versions