AIKIDO-2026-566839
github.com/traefik/traefik/v2 is vulnerable to Authentication Bypass
93
Critical Risk
This Affects:
github.com/traefik/traefik/v2TL;DR
The digestAuth middleware returns an empty secret for unknown usernames instead of rejecting them. An unauthenticated attacker can compute a valid digest response against that empty secret with arbitrary credentials and bypass authentication on any route protected by digestAuth. The fix rejects unknown usernames instead of treating them as empty-secret principals.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and at least one router uses the digestAuth middleware.
Background info
github.com/traefik/traefik/v2 is vulnerable to Authentication Bypass in versions 2.0.0 - 2.11.54.
How to fix this
Upgrade the github.com/traefik/traefik/v2 library to the patch version.
Links
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