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.
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
History
27 May 2026, 19:07
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/jib/archive-tar-new/commit/17c873492a05eddc0de18c1485e0b2cccd5a9158.patch - Patch | |
| References | () https://metacpan.org/release/BINGOS/Archive-Tar-3.08/changes - Release Notes | |
| References | () https://www.cve.org/CVERecord?id=CVE-2026-42496 - Third Party Advisory | |
| CPE | cpe:2.3:a:archive\:\:tar_project:archive\:\:tar:*:*:*:*:*:perl:*:* | |
| First Time |
Archive\ \
Archive\ |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.5 |
26 May 2026, 02:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-26 02:16
Updated : 2026-05-28 14:16
NVD link : CVE-2026-42497
Mitre link : CVE-2026-42497
CVE.ORG link : CVE-2026-42497
JSON object : View
Products Affected
archive\
- \