CVE-2026-33544

CVE-2026-33544 affects tinyauth: before v5.0.5, GenericOAuthService, GithubOAuthService, and GoogleOAuthService store PKCE verifiers and access tokens on shared singleton instances. A race between VerifyCode() and Userinfo() during concurrent OAuth logins can cause one user’s session to be popula...

CVE-2026-33544 Tinyauth has OAuth account confusion via shared mutable state on singleton service instances

Tinyauth is an authentication and authorization server. Prior to version 5.0.5, all three OAuth service implementations GenericOAuthService, GithubOAuthService, GoogleOAuthService store PKCE verifiers and access tokens as mutable struct fields on singleton instances shared across all concurrent...