Authlib RFC 7592 examples omit registration-access-token client binding

[ Description ]Official description

Authlib is a Python library which builds OAuth and OpenID Connect servers. From 0.15 until 1.9.1, the documented ClientConfigurationEndpoint.authenticate_client and ClientConfigurationEndpoint.check_permission reference implementations look up a target client from request-controlled client_id data and check only whether that target is editable, without verifying that request.credential belongs to the target client. Deployments following both examples can allow a client holding any valid registration access token to read, modify, or delete another client's registration. Changing redirect_uris can enable authorization code or token interception, while deleting registrations can deny service to affected clients. This issue is fixed in version 1.9.1.

[ Fixes ]Fixes and patches

• Authlib 1.9.1Fixed version · GitHub Advisories · pip package Authlib: upgrade to 1.9.1 or later (affected >= 0.15, <= 1.9.0)

[ Packages ]Affected open-source packages

• Authlib pipAffected >= 0.15, <= 1.9.0 · fixed in 1.9.1 · GHSA-c73q-w75p-j82v

[ References ]References

• github.com/authlib/authlib/commit/1bd2a313492ce0a4d0571c150730907aa3fc91ff
• github.com/authlib/authlib/releases/tag/v1.9.1
• github.com/authlib/authlib/security/advisories/GHSA-c73q-w75p-j82v