#VU117332 Path traversal in tar-fs - CVE-2025-59343

Vulnerability identifier: #VU117332

Vulnerability risk: High

CVSSv4.0: 6.6 [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/E:U/U:Amber]

CVE-ID: CVE-2025-59343

CWE-ID: CWE-22

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
tar-fs
Web applications / JS libraries

Vendor: mafintosh

Description

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to symlink validation bypass if the destination directory is predictable with a specific tarball. A remote attacker can send a specially crafted HTTP request and read arbitrary files on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

tar-fs: 1.0.0, 1.1.0 - 1.13.1, 1.2.0 - 1.16.3, 1.3.0 - 3.0.1, 1.4.0, 1.4.1, 1.4.2, 1.5.0, 1.5.1, 1.6.0, 3.0.2, 3.0.3, 3.0.4, 3.0.5, 3.0.6, 3.0.7, 3.0.8, 3.0.9, 3.0.10, 3.1.0

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External links
https://github.com/mafintosh/tar-fs/commit/0bd54cdf06da2b7b5b95cd4b062c9f4e0a8c4e09
https://github.com/mafintosh/tar-fs/security/advisories/GHSA-vj76-c3g6-qr5v

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.