CVE-2026-29786 PUBLISHED

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

Assigner: GitHub_M
Reserved: 04.03.2026 Published: 07.03.2026 Updated: 07.03.2026

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.

Metrics

CVSS 4.0

CVSS Vector: 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
CVSS Score: 8.2

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Local	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	High
Attack Requirements	None	Availability	Low	Availability	Low
Privileges Required	None
User Interaction	Passive

CVSS 4.0

Product Status

Vendor	isaacs
Product	node-tar
Versions	Version < 7.5.10 is affected

References

Problem Types

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') CWE
CWE-59: Improper Link Resolution Before File Access ('Link Following') CWE