A successful login does not prove that an application’s identity and access controls are secure. Behind a “Sign in” button, authorization requests, browser redirects, token exchanges, and API calls cross several trust boundaries. A weakness anywhere along this journey can…

The post OAuth 2.0 Security Testing: Common Vulnerabilities in Authentication Flows appeared first on Security Boulevard.

Shikha Dhingra

Source: Security Boulevard
Source Link: https://securityboulevard.com/2026/11/oauth-2-0-security-testing-common-vulnerabilities-in-authentication-flows/