CVE-2026-19487 Perl versions from 5.9.4 before 5.41.9 produce incorrect regular expression match results when a stale failure flag ends the Aho-Corasick prescan early in S_find_byclass

[
  {
    "collectionURL": "https://cpan.org/modules",
    "defaultStatus": "unaffected",
    "modules": [
      "perl"
    ],
    "packageName": "perl",
    "packageURL": "pkg:cpan/perl",
    "programFiles": [
      "regexec.c"
    ],
    "programRoutines": [
      {
        "name": "S_find_byclass"
      }
    ],
    "repo": "https://github.com/Perl/perl5",
    "versions": [
      {
        "lessThan": "5.41.9",
        "status": "affected",
        "version": "5.9.4",
        "versionType": "custom"
      }
    ]
  }
]