CVE-2026-42496
Published: May 28, 2026Last modified: June 3, 2026
Description
Archive::Tar versions before 3.08 for Perl extract symlinks with attacker controlled targets outside the extraction directory. _make_special_file() passes the tar header's linkname to symlink() without validating it against absolute paths or .. segments. The secure-extract mode check that guards regular file extraction does not cover the symlink target. A subsequent open through the extracted name reads or writes the attacker chosen path.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 9.1 |
| Attack Vector | NETWORK |
| Attack complexity | LOW |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | HIGH |
| Integrity impact | HIGH |
| Availability impact | NONE |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | perl | Fixed (5.36.3-r2) |
| 25 LTS | perl | Fixed (5.40.4-r1) | |
| Stream | perl | Fixed (5.42.2-r1) | |
| Hardened Containers | 23 LTS | perl | Fixed (5.36.3-r2) |
| 25 LTS | perl | Fixed (5.40.4-r1) | |
| Stream | perl | Fixed (5.42.2-r1) |
References
- https://access.redhat.com/errata/RHSA-2026:30851
- https://access.redhat.com/errata/RHSA-2026:30852
- https://access.redhat.com/errata/RHSA-2026:30856
- https://access.redhat.com/errata/RHSA-2026:30857
- https://access.redhat.com/security/cve/CVE-2026-42496
- https://bugzilla.redhat.com/show_bug.cgi?id=2481314
- https://github.com/jib/archive-tar-new/commit/17c873492a05eddc0de18c1485e0b2cccd5a9158.patch
- https://metacpan.org/release/BINGOS/Archive-Tar-3.08/changes
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42496.json
- https://www.cve.org/CVERecord?id=CVE-2026-42497