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.

INFO

Published Date :

2026-03-20T22:37:13.411Z

Last Modified :

2026-03-24T15:34:35.165Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-33204 vulnerability.

Vendors Products
Kelvin Mo
  • Simplejwt
Kelvinmo
  • Simplejwt
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-33204.

URL Resource
https://github.com/kelvinmo/simplejwt/releases/tag/v1.1.1 cve-icon cve-icon cve-icon
https://github.com/kelvinmo/simplejwt/security/advisories/GHSA-xw36-67f8-339x cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-33204 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-33204 cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact