Is there a public exploit for CVE-2026-31802?

Yes. Proof-of-concept code for CVE-2026-31802 has been published publicly.

Is there a proof of concept for CVE-2026-31802?

Yes — 3 proof-of-concept entries are linked on this page, from public repositories and community submissions. They are listed for authorised testing only.

How severe is CVE-2026-31802?

CVE-2026-31802 scores CVSS 8.2 (v4.0), rated high. EPSS puts the chance of exploitation in the next 30 days at 0.29%.

What does CVE-2026-31802 affect?

CVE-2026-31802 affects isaacs node-tar.

8.2 High

node-tar is a full-featured Tar for Node.js.

CVE-2026-31802

node-tar is a full-featured Tar for Node.js. Prior to version 7.5.11, tar (npm) can be tricked into creating a symlink that points outside the extraction directory by using a drive-relative symlink target such as C:../../../target.txt, which enables file overwrite outside cwd during normal tar.x() extraction. This vulnerability is fixed in 7.5.11.

Proof-of-concept code is published

Public PoC

Public PoCJvr2022/CVE-2026-318021 stars
Public PoCRecorded-texteditor120/CVE-2026-318021 stars
Public PoCridhinva/npm-tar-path-traversal-scanner

Signals come from Exploit-DB, Metasploit, Nuclei and published proof-of-concept repositories. Their absence means nothing was found, not that nothing exists.

Assessment

CVSS: 8.2 (v4.0)
Severity: High
EPSS: 0.29% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Public PoC
Published: 9 March 2026
Last updated: 17 June 2026
Affected: isaacs · node-tar
Weakness: CWE-22
Assigner: security-advisories@github.com

CVSS vectorCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N

At the source

References

Community proofs of concept

No community proof of concept yet. If you have one for a published vulnerability and the right to share it, add it below — it will appear here once reviewed.

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