CVE-2026-42497

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 v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/jib/archive-tar-new/commit/17c873492a05eddc0de18c1485e0b2cccd5a9158.patch	Patch
https://metacpan.org/release/BINGOS/Archive-Tar-3.08/changes	Release Notes
https://www.cve.org/CVERecord?id=CVE-2026-42496	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:archive\:\:tar_project:archive\:\:tar:*:*:*:*:*:perl:*:*

History

No history.

Information

Published : 2026-05-26 02:16

Updated : 2026-07-24 11:10

NVD link : CVE-2026-42497

Mitre link : CVE-2026-42497

CVE.ORG link : CVE-2026-42497

JSON object : View

Products Affected

archive\

\

CWE

CWE-59

Improper Link Resolution Before File Access ('Link Following')

CWE-732

Incorrect Permission Assignment for Critical Resource

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