CVE-2024-52289: Goauthentik Authentik

Critical severity, CVSS 9.8. EPSS: 1.1% chance of exploitation in the next 30 days.

authentik is an open-source identity provider. Redirect URIs in the OAuth2 provider in authentik are checked by RegEx comparison. When no Redirect URIs are configured in a provider, authentik will automatically use the first redirect_uri value received as an allowed redirect URI, without escaping characters that have a special meaning in RegEx. Similarly, the documentation did not take this into consideration either. Given a provider with the Redirect URIs set to https://foo.example.com, an attacker can register a domain fooaexample.com, and it will correctly pass validation. authentik 2024.8.5 and 2024.10.3 fix this issue. As a workaround, When configuring OAuth2 providers, make sure to escape any wildcard characters that are not intended to function as a wildcard, for example replace `.` with `\.`.

Affected products

• Goauthentik Authentik: before 2024.8.5 (fixed in 2024.8.5); from 2024.10.0, before 2024.10.3 (fixed in 2024.10.3)

Published 2024-11-21. Last modified 2026-06-17.