CVE-2024-21664: Lestrrat-Go Jwx

High severity, CVSS 7.5. EPSS: 0.9% chance of exploitation in the next 30 days.

jwx is a Go module implementing various JWx (JWA/JWE/JWK/JWS/JWT, otherwise known as JOSE) technologies. Calling `jws.Parse` with a JSON serialized payload where the `signature` field is present while `protected` is absent can lead to a nil pointer dereference. The vulnerability can be used to crash/DOS a system doing JWS verification. This vulnerability has been patched in versions 2.0.19 and 1.2.28.

Affected products

Published 2024-01-09. Last modified 2026-06-17.