Update dependency tar-fs to v2.1.4 [SECURITY]

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
tar-fs	2.1.1 → 2.1.4

---

tar-fs Vulnerable to Link Following and Path Traversal via Extracting a Crafted tar File

CVE-2024-12905 / GHSA-pq67-2wwv-3xjx

More information

Details

An Improper Link Resolution Before File Access ("Link Following") and Improper Limitation of a Pathname to a Restricted Directory ("Path Traversal"). This vulnerability occurs when extracting a maliciously crafted tar file, which can result in unauthorized file writes or overwrites outside the intended extraction directory. The issue is associated with index.js in the tar-fs package.

This issue affects tar-fs: from 0.0.0 before 1.16.4, from 2.0.0 before 2.1.2, from 3.0.0 before 3.0.7.

PoC

// Create a writable stream to extract the tar content
const extractStream = tarfs.extract('/', {
    // We can ignore the file type checks to allow the extraction of the malicious file
    ignore: (name) => false,
});

// Create a tar stream
const tarStream = tarfs.pack().on('error', (err) => {
    throw err;
});

// Append the malicious entry to the tar stream
tarStream.entry({ name: '/flag.txt', mode: 0o644 }, Buffer.from('This is a flag!'));

// Finalize the tar stream
tarStream.finalize();

// Pipe the tar stream into the extract stream
tarStream.pipe(extractStream);

Severity

• CVSS Score: 7.5 / 10 (High)
• Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References

• https://nvd.nist.gov/vuln/detail/CVE-2024-12905
• https://github.com/mafintosh/tar-fs/commit/a1dd7e7c7f4b4a8bd2ab60f513baca573b44e2ed
• https://arxiv.org/abs/2506.04962
• https://arxiv.org/pdf/2506.04962
• https://lists.debian.org/debian-lts-announce/2025/06/msg00012.html
• https://www.seal.security/blog/a-link-to-the-past-uncovering-a-new-vulnerability-in-tar-fs
• https://github.com/advisories/GHSA-pq67-2wwv-3xjx

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

---

tar-fs can extract outside the specified dir with a specific tarball

CVE-2025-48387 / GHSA-8cj5-5rvv-wf4v

More information

Details

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.

  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.

Severity

• CVSS Score: 8.7 / 10 (High)
• Vector String: 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

References

• https://github.com/mafintosh/tar-fs/security/advisories/GHSA-8cj5-5rvv-wf4v
• https://nvd.nist.gov/vuln/detail/CVE-2025-48387
• https://github.com/mafintosh/tar-fs/commit/647447b572bc135c41035e82ca7b894f02b17f0f
• https://github.com/google/security-research/security/advisories/GHSA-xrg4-qp5w-2c3w
• https://lists.debian.org/debian-lts-announce/2025/06/msg00012.html
• https://github.com/advisories/GHSA-8cj5-5rvv-wf4v

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

---

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

CVE-2025-59343 / GHSA-vj76-c3g6-qr5v

More information

Details

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.

  ignore (_, header) {
    // pass files & directories, ignore e.g. symlinks
    return header.type !== 'file' && header.type !== 'directory'
  }

Credit

Reported by: Mapta / BugBunny_ai

Severity

• CVSS Score: 8.7 / 10 (High)
• Vector String: 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

References

• 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://lists.debian.org/debian-lts-announce/2025/09/msg00028.html
• https://github.com/advisories/GHSA-vj76-c3g6-qr5v

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

---

Release Notes

mafintosh/tar-fs (tar-fs)

v2.1.4

Compare Source

v2.1.3

Compare Source

v2.1.2

Compare Source

---

Configuration

📅 Schedule: (UTC)

• Branch creation
  • At any time (no schedule defined)
• Automerge
  • At any time (no schedule defined)

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.

[renovate]

Edited/Blocked Notification

Renovate will not automatically rebase this PR, because it does not recognize the last commit author and assumes somebody else may have edited the PR.

You can manually request rebase by checking the rebase/retry box above.

⚠️ Warning: custom changes will be lost.

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	npm/​tar-fs@​2.1.1 ⏵ 2.1.4	+1	+31

View full report