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CVE-2026-77561— Tinyauth: Unauthenticated login attempts can trigger global login lockdown denial of service

一分钟漏洞结论

影响对象
tinyauthapp tinyauth
利用判断
尚无明确在野利用证据,仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本;无法立即升级时,限制受影响服务暴露并加强监测。

Tinyauth is an authentication and authorization server. Prior to 5.1.0, an unauthenticated remote attacker can send POST /api/user/login requests with 257 distinct nonexistent usernames to fill MaxLoginAttemptRecords and activate a global login lockdown. inter

CVSS 5.3 · Medium EPSS 0.48% · P41
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一、 漏洞 CVE-2026-77561 基础信息

漏洞信息

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Vulnerability Title
Tinyauth: Unauthenticated login attempts can trigger global login lockdown denial of service
来源: CVE Program / CVE List V5
Vulnerability Description
Tinyauth is an authentication and authorization server. Prior to 5.1.0, an unauthenticated remote attacker can send POST /api/user/login requests with 257 distinct nonexistent usernames to fill MaxLoginAttemptRecords and activate a global login lockdown. internal/controller/user_controller.go loginHandler passes each attacker-controlled identifier to internal/service/auth_service.go RecordLoginAttempt, which invokes lockdownMode after the map reaches its cap. IsAccountLocked checks that global state before validating unrelated accounts, causing valid users to receive HTTP 429 until auth.loginTimeout expires, approximately 300 seconds by default. The attack can be repeated, but existing authenticated sessions are not invalidated. This issue is fixed in version 5.1.0.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
来源: CVE Program / CVE List V5
Vulnerability Type
过多认证尝试的限制不恰当
来源: CVE Program / CVE List V5

受影响产品

厂商 产品 影响版本 CPE 订阅
tinyauthapp tinyauth < 5.1.0 -

二、漏洞 CVE-2026-77561 的公开POC

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三、漏洞 CVE-2026-77561 的情报信息

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CVE-2026-77561 补丁与修复 (4)

CVE-2026-77561 其他参考 (2)

同批安全公告 · tinyauthapp · 2026-09-21 · 共 3 条

CVE-2026-77560 8.1 HIGH Tinyauth: forward-auth per-app ACL is matched case-sensitively against the (case-insensiti
CVE-2026-77582 6.9 MEDIUM Tinyauth: User enumeration attack by timing oracle

IV. Related Vulnerabilities

V. Comments for CVE-2026-77561

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