Threats tagged 'ghsa-jj7h-c3hg-m23x'

Authlib versions from 0.13 up to 1.7.2 contain a vulnerability in the is_secure_transport() function, which incorrectly treats certain HTTP URLs with userinfo components as secure loopback addresses. This allows an attacker to bypass the TLS enforcement by crafting URLs like http://localhost:80@evil.example/cb, where the actual host is external but the function returns true due to a prefix string match. This flaw affects OAuth 2.0 / OIDC endpoint and redirect URI validation, potentially allowing cleartext HTTP URLs to be accepted where TLS is required. The issue is fixed in Authlib 1.8.0.