Hatchet - Unauthenticated OAuth state CSRF / login-CSRF via empty-state collision in ValidateOAuthState

Summary Hatchet version v0.86.26 and below is vulnerable to OAuth state CSRF login CSRF / account fixation. The vulnerable code clears the session oauthstate value to the empty string "" after a successful OAuth callback rather than removing the key, and the subsequent state-equality check then...

PT-2026-96142

Name of the Vulnerable Software and Affected Versions Hatchet versions prior to 0.91.1 Description A flaw in the ValidateOAuthState function allows an unauthenticated attacker to bind a victim's session to an attacker-controlled OAuth identity. This occurs because the system clears the oauth stat...