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CVE-2026-13221

קריטית 9.1

תיאור (מקור, אנגלית)

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.

מדדים

CVSS 3.1
9.1 (CRITICAL) מקור הציון: NVD CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
EPSS — סבירות ניצול
0% (אחוזון 000) נכון ל-16/8/2026
CWE
CWE-190

מוצרים מושפעים

perl: perl

קישורים