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CVE-2026-48794— Authelia 输入验证错误漏洞

一分钟漏洞结论

影响对象
authelia authelia
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。

Authelia是Authelia组织开源的一个 Web 应用程序的单点登录多因素门户。 Authelia 4.36.0版本至4.39.19之前版本存在安全漏洞，该漏洞源于特定边缘情况下域名规范化缺失，可能导致访问控制规则被绕过。

AI 预测 7.5 利用难度: 困难 EPSS 0.28% · P21

影响版本矩阵 1

厂商产品 版本范围状态
authelia authelia >= 4.36.0, < 4.39.20 affected
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一、 漏洞 CVE-2026-48794 基础信息

漏洞信息
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Vulnerability Title
Authelia has an Edge Case Access Control Rule Mismatch
来源: CVE Program / CVE List V5
Vulnerability Description
Authelia is an open-source authentication and authorization server providing two-factor authentication and single sign-on (SSO) for applications via a web portal. In versions 4.36.0 through 4.39.19, due to lack of canonicalization of domains in very specific edge cases, an access control rule may be skipped when it should match a request. The specific conditions that could lead to a security issue for vulnerability are: 1. The specific target resource of the attack must be using the forwarded authorization integration; 2. The requested domain must have two additional segments compared to a session domain i.e. `a.b.example.com` is requested, but the session domain is `example.com`; 3. There access control rules must specify two separate rules which both contain inexact domain matches such as `*.b.example.com` and `*.example.com` i.e. wildcards, username matches, group matches; 4. The rules must be in order of most specific domain to least specific domain; 5. The second rule must be more permissive than the first rule; 6. The attacker must specifically request a URL for the more specific domain, with the second part containing one or more capitalized letters i.e. `https://a.B.example.com` and no other segment with capitalized letters; 7. The integration used must not be the Envoy ExtAuthz integration; and 8. The proxy must not canonicalize the requested host name in the relevant header before sending it to the relevant authorization endpoint. The kind of configuration used to produce this issue and result in a `bypass` rule being matched has long been highly discouraged. Essentially hosts which should be bypassed entirely should not be secured by having the proxy check them with the authorization handlers. Upgrade to 4.39.20 to receive a patch.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/E:P
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
Vulnerability Title
Authelia 输入验证错误漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Authelia是Authelia组织开源的一个 Web 应用程序的单点登录多因素门户。 Authelia 4.36.0版本至4.39.19之前版本存在安全漏洞，该漏洞源于特定边缘情况下域名规范化缺失，可能导致访问控制规则被绕过。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD

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受影响产品

厂商 产品 影响版本 CPE 订阅
authelia authelia >= 4.36.0, < 4.39.20 -

二、漏洞 CVE-2026-48794 的公开POC

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三、漏洞 CVE-2026-48794 的情报信息

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CVE-2026-48794 补丁与修复 (1)

CVE-2026-48794 厂商安全公告 (1)

IV. Related Vulnerabilities

Same product: authelia
Same vendor: authelia
Same weakness: CWE-178

V. Comments for CVE-2026-48794

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