Description

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 requests. When two users initiate OAuth login for the same provider concurrently, a race condition between VerifyCode() and Userinfo() causes one user to receive a session with the other user's identity. This issue has been patched in version 5.0.5.

INFO

Published Date :

2026-04-02T15:00:38.450Z

Last Modified :

2026-04-02T15:00:38.450Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-33544 vulnerability.

Vendors Products
Steveiliop56
  • Tinyauth

CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact