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Tool Directory

CVE-2026-29786

HighPublished

node-tar: Hardlink Path Traversal via Drive-Relative Linkpath

Published: Mar 7, 2026
Updated: Sep 1, 2026
Assigning CNA: GitHub_M
Evidence observed: Aug 25, 2026

Primary CVSS

8.2/ 10High

nvd · CVSS 4.0

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:L/SC:N/SI:H/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS probability estimate

0.4%

Low · next 30 days

Percentile: 37.5%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

node-tar is a full-featured Tar for Node.js. Prior to version 7.5.10, tar can be tricked into creating a hardlink that points outside the extraction directory by using a drive-relative link target such as C:../target.txt, which enables file overwrite outside cwd during normal tar.x() extraction. This issue has been patched in version 7.5.10.

Sources

CVE-2026-29786PoC
Proof-of-concept demonstrating a hardlink path traversal in the tar npm package, allowing overwrite of files outside the extraction directory via crafted archives.
NodeJS-Tar-Symlink-Exploit-CVE-2026-29786PoC
Technical analysis and Proof-of-Concept (PoC) for a critical Path Traversal vulnerability via Symlink manipulation in the Node.js 'tar' package (CVE-2026-29786)

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