CVE-2026-33204

HIGH SEVERITY

CVSS Score & Metrics

Base Score

7.5 / 10

Vector String

                                        CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H                                    

Vulnerability 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.

Vulnerability Details

Published Date

March 18, 2026

Last Modified

March 23, 2026

CWE ID

CWE-400

Source

GitHub

Vendor

composer

Product

kelvinmo/simplejwt

External References

https://github.com/kelvinmo/simplejwt/security/advisories/GHSA-xw36-67f8-339x
https://github.com/advisories/GHSA-xw36-67f8-339x

CVE-2026-33204

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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