GHSA-vj76-c3g6-qr5v
tar-fs has a symlink validation bypass if destination directory is predictable with a specific tarball
Packages
Details
As written in the advisory (Markdown source, shown as plain text).
### 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.
```js
ignore (_, header) {
// pass files & directories, ignore e.g. symlinks
return header.type !== 'file' && header.type !== 'directory'
}
```
### Credit
Reported by: Mapta / BugBunny_ai
References
External links from the advisory. They lead to third-party sites.
- https://github.com/mafintosh/tar-fs/security/advisories/GHSA-vj76-c3g6-qr5v
- https://nvd.nist.gov/vuln/detail/CVE-2025-59343
- https://github.com/mafintosh/tar-fs/commit/0bd54cdf06da2b7b5b95cd4b062c9f4e0a8c4e09
- https://github.com/mafintosh/tar-fs
- https://lists.debian.org/debian-lts-announce/2025/09/msg00028.html