Highlights
Auth Bypass: 1 prior fix. Scrutinize any change in this area.
slack_sdk/oauth/installation_store/sqlalchemy/__init__.py: most-fixed (1 issue). Treat as high-risk during review.
2 high-severity fixes in this history; regressions here are high-impact.
Recurring patterns
The bug types that recur here, drawn from past fixes, not open vulnerabilities.
Auth Bypass: Installation lookup lacked a client_id filter, allowing cross-client token leakage. This is a direct authorization boundary failure in a core OAuth data path.
Authentication Bypass: Proxy credentials were not URL-decoded before base64 encoding, enabling header injection and authentication bypass. This affects the socket-mode connection path.
Reflected XSS: User-controlled error parameters were rendered without HTML escaping, enabling reflected XSS in the OAuth failure page.