CVE-2026-33204

Published: Mar 20, 2026Modified: Apr 10, 2026

7.5

Vector

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

Exploitability: 3.9 / Impact: 3.6

Source: security-advisories@github.com (Secondary)

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.

Affected (1)

Products: Kelvinmo: Simplejwt

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Kelvinmo Simplejwt	Before 1.1.1

Related CWEs

Uncontrolled Resource Consumption

The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.

References (2)

https://github.com/kelvinmo/simplejwt/releases/tag/v1.1.1

Source: security-advisories@github.com

ProductRelease Notes

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

Source: security-advisories@github.com

ExploitVendor Advisory

Timeline

No history available yet.