CVE-2026-39976: Improper Authentication

Laravel Passport provides OAuth2 server support to Laravel. From 13.0.0 to before 13.7.1, there is an Authentication Bypass for clientcredentials tokens. the league/oauth2-server library sets the JWT sub claim to the client identifier since there's no user. The token guard then passes this value ...

GHSA-349C-2H2F-MXF6 Laravel Passport: TokenGuard Authenticates Unrelated User for Client Credentials Tokens

Impact Authentication Bypass for clientcredentials tokens. the league/oauth2-server library sets the JWT sub claim to the client identifier since there's no user. The token guard then passes this value to retrieveById without validating it's actually a user identifier, potentially resolving an...