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.
References
- www.cve.org/CVERecord ↗
- nvd.nist.gov/vuln/detail/CVE-2026-42496 ↗
- github.com/jib/archive-tar-new/commit/17c873492a05eddc0de18c1485e0b2cccd5a9158.patch ↗
- metacpan.org/release/BINGOS/Archive-Tar-3.08/changes ↗
- www.cve.org/CVERecord ↗
- access.redhat.com/errata/RHSA-2026:30851 ↗
- access.redhat.com/errata/RHSA-2026:30852 ↗
- access.redhat.com/errata/RHSA-2026:30856 ↗
- access.redhat.com/errata/RHSA-2026:30857 ↗
- access.redhat.com/security/cve/CVE-2026-42496 ↗
- bugzilla.redhat.com/show_bug.cgi ↗
- cert-portal.siemens.com/productcert/html/ssa-457936.html ↗
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42496.json ↗
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This product uses the NVD API but is not endorsed or certified by the NVD. CVSS scores do not establish exploitation.