CVE-2026-31802

node-tar Symlink Path Traversal via Drive-Relative Linkpath

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

isaacs · node-tar

CVSS v4.0 GITHUB

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

CVSS v4.0 GitHub

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

CVSS v3.1 NVD

5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

EPSS

0.19% chance of exploitation in the next 30 days, 8th percentile

Published

2026-03-09

Updated

2026-03-10

Proof-of-concept exploits (2)

• advisories/GHSA-9ppj-qmqm-q256
• Recorded-texteditor120/CVE-2026-318021★ · 2026-10-09

Security advisories

• isaacs/node-tar/commit/f48b5fa3b7985ddab96dc0f2125a4ffc9911b6ad
• isaacs/node-tar/security/advisories/GHSA-9ppj-qmqm-q256

References

• CVE Record
• NVD entry