CVE-2021-46743: Access of Resource Using Incompatible Type

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 t...

PT-2018-4549

Name of the Vulnerable Software and Affected Versions jsonwebtoken versions 4.2.1 and earlier Description The issue allows an attacker to bypass verification when a token digitally signed with an asymmetric key is sent, but the attacker instead sends a token digitally signed with a symmetric...

Critical Vulnerabilities Affecting JSON Web Token Libraries

Critical vulnerabilities exist in several JSON Web Token JWT libraries – namely the JavaScript and PHP versions – that could let an attacker bypass the verification step. Tim McLean, a Canadian security researcher who specializes in cryptography and dug up the issues, points out that attackers...