Vulnerability Description
Archive::Tar versions before 3.08 for Perl extract hardlinks to attacker controlled paths outside the extraction directory. _make_special_file() passes the tar header's linkname to link() without validating it against absolute paths or .. segments, creating a hardlink that shares the victim file's inode. A subsequent write through the extracted name modifies the victim file, and the post-extraction chmod, chown, and utime block in _extract_file() (guarded only against symlinks via -l) applies the tar header's mode, owner, and timestamps to the shared inode during extraction alone.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Archive\ | \ | < 3.08, tar_project |
Related Weaknesses (CWE)
References
- https://github.com/jib/archive-tar-new/commit/17c873492a05eddc0de18c1485e0b2cccdPatch
- https://metacpan.org/release/BINGOS/Archive-Tar-3.08/changesRelease Notes
- https://www.cve.org/CVERecord?id=CVE-2026-42496Third Party Advisory
FAQ
What is CVE-2026-42497?
CVE-2026-42497 is a vulnerability with a CVSS score of 7.5 (HIGH). Archive::Tar versions before 3.08 for Perl extract hardlinks to attacker controlled paths outside the extraction directory. _make_special_file() passes the tar header's linkname to link() without val...
How severe is CVE-2026-42497?
CVE-2026-42497 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-42497?
Check the references section above for vendor advisories and patch information. Affected products include: Archive\ \.