CVE-2026-29786

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.

Affected Software

Weaknesses

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

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: partial

node-tar: hardlink path traversal via drive-relative linkpath

Additional References

• 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

References

• https://github.com/isaacs/node-tar/security/advisories/GHSA-qffp-2rhf-9h96
• https://github.com/isaacs/node-tar/commit/7bc755dd85e623c0279e08eb3784909e6d7e4b9f

• ←Previous
• Next→