What’s Vulnerable › Vulnerabilities

CVE-2026-31802: node-tar Symlink Path Traversal via Drive-Relative Linkpath

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-03-10 · updated 2026-06-17
• Weakness: CWE-22

Description

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.

Affected products

• isaacs node-tar: before 7.5.11 — fixed in 7.5.11
• Npm Tar: before 7.5.11 — fixed in 7.5.11

How to fix

Upgrade to a fixed version: isaacs node-tar 7.5.11; Npm Tar 7.5.11. Check the vendor advisory for mitigations.

References

• https://github.com/isaacs/node-tar/commit/f48b5fa3b7985ddab96dc0f2125a4ffc9911b6ad
• https://github.com/isaacs/node-tar/security/advisories/GHSA-9ppj-qmqm-q256
• https://github.com/isaacs/node-tar/security/advisories/GHSA-9ppj-qmqm-q256

Get alerted when CVE-2026-31802 or the next vulnerability affects your stack