CVE-2026-77781 — Tie::Hash::Regex versions before 2.0.0 for Perl will throw an exception on unparseable lookup keys
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 re…
Published: 2026-08-21 · CVSS: 7.5 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7