CVE-2025-59343

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

CVSS 8.7 HIGHEPSS 0.5%CWE-22 CWE-61

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 8.7EPSS 0.5%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

24 Sep 2025Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

tar-fs provides filesystem bindings for tar-stream. Versions prior to 3.1.1, 2.1.3, and 1.16.5 are vulnerable to symlink validation bypass if the destination directory is predictable with a specific tarball. This issue has been patched in version 3.1.1, 2.1.4, and 1.16.6. A workaround involves using the ignore option on non files/directories.

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 products

mafintosh · tar-fs

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References

https://github.com/mafintosh/tar-fs/commit/0bd54cdf06da2b7b5b95cd4b062c9f4e0a8c4e09 https://github.com/mafintosh/tar-fs/security/advisories/GHSA-vj76-c3g6-qr5v https://lists.debian.org/debian-lts-announce/2025/09/msg00028.html