CVE-2026-26247 Gitea OAuth2 PKCE S256 challenges are not enforced during token exchange

Gitea versions before 1.25.5 do not persist the OAuth2 PKCE S256 challenge method correctly during authorization, allowing token exchange without the expected verifier check...

CVE-2026-40948

The Keycloak authentication manager in apache-airflow-providers-keycloak (versions prior to 0.7.0 ) is vulnerable to login-CSRF and session fixation because it fails to generate or validate the OAuth 2.0 state parameter during login and login-callback flows, and it lacks PKCE (Proof Key for Code ...