Vulnerability Details CVE-2026-33204
SimpleJWT is a simple JSON web token library written in PHP. Prior to version 1.1.1, an unauthenticated attacker can perform a Denial of Service via JWE header tampering when PBES2 algorithms are used. Applications that call JWE::decrypt() on attacker-controlled JWEs using PBES2 algorithms are affected. This issue has been patched in version 1.1.1.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 18.0%
CVSS Severity
CVSS v3 Score 7.5