CVE-2026-33672
Publiée le 2026-03-26 · Dernière modification le 2026-06-17
Les applications JavaScript utilisant la bibliothèque `picomatch` pour faire correspondre des noms de fichiers sont concernées. Un attaquant peut fournir un modèle de recherche spécialement conçu pour tromper le système et cibler des fichiers non intentionnels, ce qui pourrait contourner des filtres de sécurité ou la logique de contrôle d'accès. Cette opération est facile à exécuter via un réseau, sans authentification ni interaction de l'utilisateur, à condition que l'application permette aux utilisateurs de saisir leurs propres modèles de globbing.
DÉTAIL DU VECTEUR CVSS
RÉFÉRENCES
Description officielle du NVD (en anglais)
Picomatch is a glob matcher written JavaScript. Versions prior to 4.0.4, 3.0.2, and 2.3.2 are vulnerable to a method injection vulnerability affecting the `POSIX_REGEX_SOURCE` object. Because the object inherits from `Object.prototype`, specially crafted POSIX bracket expressions (e.g., `[[:constructor:]]`) can reference inherited method names. These methods are implicitly converted to strings and injected into the generated regular expression. This leads to incorrect glob matching behavior (integrity impact), where patterns may match unintended filenames. The issue does not enable remote code execution, but it can cause security-relevant logic errors in applications that rely on glob matching for filtering, validation, or access control. All users of affected `picomatch` versions that process untrusted or user-controlled glob patterns are potentially impacted. This issue is fixed in picomatch 4.0.4, 3.0.2 and 2.3.2. Users should upgrade to one of these versions or later, depending on their supported release line. If upgrading is not immediately possible, avoid passing untrusted glob patterns to picomatch. Possible mitigations include sanitizing or rejecting untrusted glob patterns, especially those containing POSIX character classes like `[[:...:]]`; avoiding the use of POSIX bracket expressions if user input is involved; and manually patching the library by modifying `POSIX_REGEX_SOURCE` to use a null prototype.