What’s Vulnerable › Vulnerabilities

CVE-2026-29786: node-tar: Hardlink Path Traversal via Drive-Relative Linkpath

• Severity: medium (CVSS 6.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-03-07 · updated 2026-09-01
• Weakness: CWE-22

Description

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.

Affected products

• isaacs node-tar: before 7.5.10 — fixed in 7.5.10
• Npm Tar: before 7.5.10 — fixed in 7.5.10

How to fix

Upgrade to a fixed version: isaacs node-tar 7.5.10; Npm Tar 7.5.10. Check the vendor advisory for mitigations.

References

• https://github.com/isaacs/node-tar/commit/7bc755dd85e623c0279e08eb3784909e6d7e4b9f
• https://github.com/isaacs/node-tar/security/advisories/GHSA-qffp-2rhf-9h96
• https://access.redhat.com/security/cve/CVE-2026-29786
• https://bugzilla.redhat.com/show_bug.cgi?id=2445476
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-29786.json

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