Threats Tagged 'cve-2026-13221'
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Threats Tagged 'cve-2026-13221'
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CVE-2026-13221: CWE-190 Integer Overflow or Wraparound in SHAY perlCVE-2026-13221 0 Perl versions through 5.43.9 produce silently incorrect regular expression matches when an alternation of more than 65535 fixed string branches is compiled into a trie in Perl_study_chunk. When such branches are combined into a trie, the delta between the first branch and the shared tail is stored in a 16-bit field. A branch count above 65535 overflows the field, and the trie's match decision table is truncated with no warning or error. A pattern of this shape produces false positive matches (matching strings it should not) and false negative matches (failing to match strings it should). When such a pattern gates an access or filtering decision, the result is wrong. Join the discussion | CVE Database V5 | 07/13/2026, 15:40:11 UTC Added: 07/13/2026, 16:33:11 UTC |
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