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CVE-2026-42497 is an improper link-resolution vulnerability in Perl Archive::Tar before version 3.08. During extraction, the module's special-file handling passes an archive-supplied hardlink target directly to the operating system link operation without rejecting absolute paths or parent-directory traversal segments. A crafted archive can therefore create a hardlink in the extraction tree to an existing file outside that tree. Because the post-extraction metadata handling excludes symlinks but not hardlinks, Archive::Tar can also apply archive-controlled mode, ownership, and timestamp metadata to the shared inode.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
5 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.