Fiche vulnérabilité
CVE-2021-46743 : faille critique google firebase php-jwt (CVSS 9.1)
Description
In Firebase PHP-JWT before 6.0.0, an algorithm-confusion issue (e.g., RS256 / HS256) exists via the kid (aka Key ID) header, when multiple types of keys are loaded in a key ring. This allows an attacker to forge tokens that validate under the incorrect key. NOTE: this provides a straightforward way to use the PHP-JWT library unsafely, but might not be considered a vulnerability in the library itself.
En bref
- Sévérité
- Critique (CVSS 9.1)
- Vecteur CVSS
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- Exploitation active
- Non signalée par la CISA
- Publication
- 29 mars 2022
- Dernière mise à jour
- 17 juin 2026
Produits concernés
- google firebase php-jwt