CVE-2026-42496
Critical · CVSS 9.1Archive::Tar (Perl) — Symlink path traversal / arbitrary file read-write via tar extraction (CWE-59, CWE-22)
- CVSS
- 9.1
- nvd
- EPSS
- —
- KEV
- No
- Class
- oss containerizable
- CWE-59, CWE-22
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.
Search profile — drives PoC discovery
Ranked PoCs (2) — best first
Heuristic ranking — not yet expert-vetted. Scored on structure + provenance, not execution.
- ★ 1
- ★ 1Jvr2022/CVE-2026-31802 needs reviewgh_search · JavaScript
Recall-favoring discovery; ranking by the Stage-4 scorer (Adam's rubric). Scanner/aggregator repos are hidden.
References
- https://github.com/jib/archive-tar-new/commit/17c873492a05eddc0de18c1485e0b2cccd5a9158.patch
- https://metacpan.org/release/BINGOS/Archive-Tar-3.08/changes
- https://www.cve.org/CVERecord?id=CVE-2026-42497
- 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://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42496.json
Status: enriched · ingested 2026-06-30T06:00:22.000Z · profiled 2026-07-01T12:30:14.000Z