GHSA-JJ7H-C3HG-M23X Authlib: is_secure_transport() loopback exemption can be bypassed with a userinfo component, allowing cleartext-HTTP URLs to non-loopback hosts

Summary authlib.common.security.issecuretransport is used throughout Authlib to enforce the OAuth 2.0 / OIDC requirement that endpoint and redirect URIs use TLS, with an RFC 8252 §7.3 exemption for loopback http:// URIs. The check is implemented as a textual str.startswith prefix match, so a URL...

Authlib: is_secure_transport() loopback exemption can be bypassed with a userinfo component, allowing cleartext-HTTP URLs to non-loopback hosts

Summary authlib.common.security.issecuretransport is used throughout Authlib to enforce the OAuth 2.0 / OIDC requirement that endpoint and redirect URIs use TLS, with an RFC 8252 §7.3 exemption for loopback http:// URIs. The check is implemented as a textual str.startswith prefix match, so a URL...

Improper Authentication

doorkeeper is vulnerable to Improper Authentication. The vulnerability exists because user authentication is automatically processed without consent of the user if the authentication token matches, which is out of OAuth RFC 8252 spec, allowing an attacker to impersonate a user and possibly bypass...

GHSA-7W2C-W47H-789W Doorkeeper Improper Authentication vulnerability

OAuth RFC 8252 says https://www.rfc-editor.org/rfc/rfc8252section-8.6 the authorization server SHOULD NOT process authorization requests automatically without user consent or interaction, except when the identity of the client can be assured. This includes the case where the user has previously...