CVE-2026-77781
HighCVSS 7.5Exploitation Probability (EPSS)
Low risk45th percentile - higher than 45% of all known CVEs
Summary
The Tie::Hash::Regex module for Perl before version 2.0.0 throws an exception on unparseable lookup keys. The FETCH, EXISTS, and DELETE methods throw an exception when the key is an invalid regular expression, potentially causing application termination.
Risk Assessment
Applications processing external data in such a hash may crash, leading to denial of service (DoS).
Recommendation
Update the Tie::Hash::Regex module to version 2.0.0 or later, which includes a fix.
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Original NVD description (English source)
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.