CVE-2026-33204

7.5 highEPSS 0.5%

High (7.5) in kelvinmo simplejwt. EPSS 0.5% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

7.5 high

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

EPSS: 0.5% chance of exploitation in the next 30 days; higher than 42% of CVEs (scores of 2026-10-31)
CWE: CWE-400
Published: 2026-03-20
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

kelvinmo:simplejwt

References

https://github.com/kelvinmo/simplejwt/releases/tag/v1.1.1
https://github.com/kelvinmo/simplejwt/security/advisories/GHSA-xw36-67f8-339x

Check your stack JSON