漏洞信息
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Vulnerability Title
OAuth2 Proxy 7.15.2 through 7.15.4 Authentication Bypass via X-Forwarded-Uri Under the Default Trusted Proxy Set
Vulnerability Description
OAuth2 Proxy honours a client-supplied X-Forwarded-Uri header when deciding whether a request may skip authentication, because the guard added for CVE-2026-40575 is inert in the default reverse-proxy configuration. GetRequestURI in pkg/requests/util/util.go prefers that header over the real request URI whenever CanTrustForwardedHeaders returns true, and isAllowedPath in oauthproxy.go matches the skip_auth_routes and skip_auth_regex allow list against the resulting path. CanTrustForwardedHeaders in pkg/apis/middleware/scope.go grants that trust when the caller's address is in the trusted proxy set, and buildTrustedProxyNetSet falls back to defaultTrustedProxyIPs, which is 0.0.0.0/0 and ::/0, whenever reverse proxy mode is enabled without trusted_proxy_ip configured. Every client is therefore treated as a trusted proxy. An unauthenticated attacker can request a protected upstream path while setting X-Forwarded-Uri to a value matching an allow-listed route, so the skip-auth decision is made against the spoofed value while the upstream receives the protected path unchanged.
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Vulnerability Type
使用欺骗进行的认证绕过
Vulnerability Title
oauth2-proxy 授权问题漏洞
Vulnerability Description
oauth2-proxy是oauth2-proxy组织的一款提供OAuth2认证的反向代理工具。 oauth2-proxy 7.15.2版本至7.15.4版本存在授权问题漏洞,该漏洞源于对客户端提供的X-Forwarded-Uri头处理不当,默认反向代理配置下信任该头部,可能导致未经身份验证的攻击者通过伪造X-Forwarded-Uri绕过身份验证。
CVSS Information
N/A
Vulnerability Type
N/A