7.5
High
CVE-2026-42497 Archive::Tar versions before 3.08 for Perl extract hardlinks to attacker controlled paths outside the extraction…
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Archive::Tar 3.08 | earliest → < 3.08 | 3.08 |
References
- github.com github.com
- metacpan.org metacpan.org
- www.cve.org www.cve.org
Timeline
- Published
- Last modified