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 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.
- CVSS 4.0
- 6.9
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N - EPSS
- 0.6% chance of exploitation in the next 30 days; higher than 49% of CVEs (scores of 2026-10-25)
- CWE
- CWE-208
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-456h-ww26-f758 | Go | github.com/tinyauthapp/tinyauth | <1.0.1-0.20260714134959-c22925c2fba9 | 1.0.1-0.20260714134959-c22925c2fba9 |
| GO-2026-6555 | Go | github.com/tinyauthapp/tinyauth | <1.0.1-0.20260714134959-c22925c2fba9 | 1.0.1-0.20260714134959-c22925c2fba9 |
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
- https://github.com/tinyauthapp/tinyauth/security/advisories/GHSA-456h-ww26-f758