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CVE-2025-59343

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

HIGH
8.7
CVSS Score
Published: September 24, 2025 at 05:43 PM UTC
Updated: June 17, 2026 at 09:45 AM UTC
1 product affected across 1 vendorTar Fs

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Severity
HIGH8.7
Exploit prediction
EPSS 0.6%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Tar Fs· Mafintosh
60%
v < 1.16.5v < 2.1.3v < 3.1.1
Affected range stops below 1.16.5, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.1.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.1.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (3)

x_refsource_CONFIRM
Source: cverecord
https://github.com/mafintosh/tar-fs/security/advisories/GHSA-vj76-c3g6-qr5v
x_refsource_MISC
Source: cverecord
https://github.com/mafintosh/tar-fs/commit/0bd54cdf06da2b7b5b95cd4b062c9f4e0a8c4e09
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.debian.org/debian-lts-announce/2025/09/msg00028.html

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.7HIGHGitHub_M
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-22CWE-61

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