CVE-2026-77582: medium-severity vulnerability in tinyauthapp tinyauth
Tinyauth: User enumeration attack by timing oracle
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.9epss 0.6%
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/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Affected products
tinyauthapp · tinyauthRelated CVEs — tinyauthapp tinyauth
In the same product, most dangerous first.
CVE-2026-77560HIGHTinyauth: forward-auth per-app ACL is matched case-sensitively against the (case-insensitive) hostname, letting an authenticated user reach apps they are not on the allowlist forEPSS 0.6%CVE-2026-77561MEDIUMTinyauth: Unauthenticated login attempts can trigger global login lockdown denial of serviceEPSS 0.6%