tar-fs can extract outside the specified dir with a specific tarball
### Impact v3.0.8, v2.1.2, v1.16.4 and below ### Patches Has been patched in 3.0.9, 2.1.3, and 1.16.5 ### Workarounds You can use the ignore option to ignore non files/directories. ```js ignore (_, header) { // pass files & directories, ignore e.g. symlinks return header.type !== 'file' && header.type !== 'directory' } ``` ### Credit Thank you Caleb Brown from Google Open Source Security Team for reporting this in detail.
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2025-48387US | — | — | ||
tar-fs provides filesystem bindings for tar-stream. Versions prior to 3.0.9, 2.1.3, and 1.16.5 have an issue where an extract can write outside the specified dir with a specific ta… | ||||
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references
External citations — patches, advisories, analysis.
- https://github.com/google/security-research/security/advisories/GHSA-xrg4-qp5w-2c3wWEB
- https://github.com/mafintosh/tar-fsPACKAGE
- https://github.com/mafintosh/tar-fs/commit/647447b572bc135c41035e82ca7b894f02b17f0fWEB
- https://github.com/mafintosh/tar-fs/security/advisories/GHSA-8cj5-5rvv-wf4vWEB
- https://lists.debian.org/debian-lts-announce/2025/06/msg00012.htmlWEB
- https://nvd.nist.gov/vuln/detail/CVE-2025-48387ADVISORY
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