CVE-2021-21335: Spnego HTTP Authentication Module Project Spnego HTTP Authentication Module

Critical severity, CVSS 9.8. EPSS: 1.7% chance of exploitation in the next 30 days.

In the SPNEGO HTTP Authentication Module for nginx (spnego-http-auth-nginx-module) before version 1.1.1 basic Authentication can be bypassed using a malformed username. This affects users of spnego-http-auth-nginx-module that have enabled basic authentication. This is fixed in version 1.1.1 of spnego-http-auth-nginx-module. As a workaround, one may disable basic authentication.

Affected products

• Spnego HTTP Authentication Module Project Spnego HTTP Authentication Module: before 1.1.1 (fixed in 1.1.1)

Published 2021-03-08. Last modified 2026-06-17.