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CVE-2026-77560— Tinyauth: 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 for

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 5.1.2, Tinyauth compares forwarded hostnames case-sensitively while reverse proxies route equivalent hostnames case-insensitively, allowing an authenticated low-privilege user to bypass per-app a

CVSS 8.1 · High EPSS 0.33% · P27

影响版本矩阵 1

厂商产品 版本范围状态
tinyauthapp tinyauth < 5.1.2 affected
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一、 漏洞 CVE-2026-77560 基础信息

漏洞信息

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Vulnerability Title
Tinyauth: 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 for
来源: CVE Program / CVE List V5
Vulnerability Description
Tinyauth is an authentication and authorization server. Prior to 5.1.2, Tinyauth compares forwarded hostnames case-sensitively while reverse proxies route equivalent hostnames case-insensitively, allowing an authenticated low-privilege user to bypass per-app access controls with a differently cased hostname. The lookup in internal/service/access_controls_service.go through lookupStaticACLs and GetAccessControls, and the Docker-label fallback in internal/service/docker_service.go through GetLabels, can miss the configured app and return an empty access-control object. internal/controller/proxy_controller.go proxyHandler then treats the empty user, group, OAuth, LDAP, and IP restrictions as permissive and returns an authenticated result for an app that should exclude the user. Unauthenticated users remain subject to login, and global login-time allowlists are not bypassed. This issue is fixed in version 5.1.2.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
来源: CVE Program / CVE List V5
Vulnerability Type
大小写敏感处理不恰当
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 < 5.1.2 -

二、漏洞 CVE-2026-77560 的公开POC

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三、漏洞 CVE-2026-77560 的情报信息

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CVE-2026-77560 补丁与修复 (2)

CVE-2026-77560 其他参考 (2)

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

CVE-2026-77582 6.9 MEDIUM Tinyauth: User enumeration attack by timing oracle
CVE-2026-77561 5.3 MEDIUM Tinyauth: Unauthenticated login attempts can trigger global login lockdown denial of servi

IV. Related Vulnerabilities

Same product: tinyauth
Same vendor: tinyauthapp
Same weakness: CWE-178

V. Comments for CVE-2026-77560

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