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CVE-2026-42497

7.5 HIGH

Archive::Tar versions before 3.08 for Perl extract hardlinks to attacker controlled paths outside the extraction directory

Published: 2026-05-26 · Last updated: 2026-05-28

Severity and scoring

CVSS
7.5 HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CWE
CWE-59, CWE-732

Affected products

VendorProduct
archive\\

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.

Source: NVD

References

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