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CVE-2025-59343 — tar-fs has a symlink validation bypass if destination directory is predictable with a specific tarball

Affected: mafintosh tar-fs

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.

GHSA-vj76-c3g6-qr5v — tar-fs has a symlink validation bypass if destination directory is predictable with a specific tarball

Affected: npm: tar-fs

### 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