CVE-2026-77781

Tie::Hash::Regex versions before 2.0.0 for Perl will throw an exception on unparseable lookup keys.<br /> <br /> The FETCH, EXISTS and DELETE methods throw an exception when on malformed regular expressions.<br /> <br /> Each method falls back to a regex match when the key is not already stored in the hash, compiling the caller&amp;#39;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.<br /> <br /> An application that looks up externally supplied strings in a tied hash will die on an invalid key.