MEDIUM 6.9 NVD
CVE-2026-77582
Tinyauth is an authentication and authorization server. Prior to 5.1.0, Tinyauth exposes a remotely observable timing difference between authentication attempts
Tinyauth is an authentication and authorization server. Prior to 5.1.0, Tinyauth exposes a remotely observable timing difference between authentication attempts for existing and nonexistent local usernames. internal/controller/user_controller.go loginHandler and internal/middleware/context_middleware.go basicAuth return quickly after internal/service/auth_service.go reports a missing user, while an existing user causes bcrypt password verification work. Repeated measurements can therefore disclose valid usernames and support targeted credential attacks. This issue is fixed in version 5.1.0.
References
- https://github.com/tinyauthapp/tinyauth/commit/c22925c2fba981875d0a2b09dd3ee41c0ae4c310
- https://github.com/tinyauthapp/tinyauth/pull/1004
- https://github.com/tinyauthapp/tinyauth/releases/tag/v5.1.0
- https://github.com/tinyauthapp/tinyauth/security/advisories/GHSA-456h-ww26-f758
This medium severity vulnerability with a CVSS score of 6.9 was published on 2026-09-21 via NVD.
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