CVE-2026-33204

Published March 20th, 2026

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CVSS v3

7.5

HIGH

CVSS v2

N/A

Affected

PROJECT

Description

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.

kelvinmo/simplejwt

A simple JSON web token library written in PHP.

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