Vulnerability Description
Tie::Hash::Regex versions before 2.0.0 for Perl will throw an exception on unparseable lookup keys. The FETCH, EXISTS and DELETE methods throw an exception when on malformed regular expressions. Each method falls back to a regex match when the key is not already stored in the hash, compiling the caller's key with a bare qr// and no eval guard. A key that is not a valid regular expression pattern, such as a single unmatched bracket, dies. An application that looks up externally supplied strings in a tied hash will die on an invalid key.
Related Weaknesses (CWE)
References
- https://github.com/davorg-cpan/tie-hash-regex/commit/4239732cb76233543e2ded8ff5e
- https://metacpan.org/release/DAVECROSS/Tie-Hash-Regex-2.0.0/source/Changes
- http://www.openwall.com/lists/oss-security/2026/08/22/2
FAQ
What is CVE-2026-77781?
CVE-2026-77781 is a documented vulnerability. Tie::Hash::Regex versions before 2.0.0 for Perl will throw an exception on unparseable lookup keys. The FETCH, EXISTS and DELETE methods throw an exception when on malformed regular expressions. Eac...
How severe is CVE-2026-77781?
CVSS scoring is not yet available for CVE-2026-77781. Check NVD for updates.
Is there a patch for CVE-2026-77781?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.