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CVE-2026-94197— NGINX Ingress Controller vulnerability

Quick assessment

Affected
F5 NGINX Ingress Controller
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

F5 NGINX Kubernetes Ingress Controller（NIC）在配置 策略或 Ingress 外部认证时，存在身份验证和授权绕过漏洞。客户端提供的 X-Forwarded-Prefix、X-Forwarded-URI、X-Original-URI 和 X-Forwarded-Method 路由及方法头被未加清理地转发到内部认证子请求（由 NGINX 的 auth_request 指令处理）。因此，未经认证的远程攻击者可以伪造外部认证提供商评估的请求属性。 影响： 该漏洞可能允许远程攻击者：

CVSS 7.5 · High EPSS 0.39% · P32

Affected Version Matrix 1

VendorProduct Version RangeStatus
F5 NGINX Ingress Controller 5.5.0< 5.7.0 affected
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I. Basic Information for CVE-2026-94197

Vulnerability Information
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Vulnerability Title
NGINX Ingress Controller vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
An authentication and authorization bypass vulnerability exists in F5 NGINX Kubernetes Ingress Controller (NIC) when configured with the `ExternalAuth` policy or Ingress external authentication. Client-supplied X-Forwarded-Prefix, X-Forwarded-URI, X-Original-URI, and X-Forwarded-Method routing and method headers are forwarded unsanitized into the internal authentication subrequest (handled by the NGINX auth_request directive). As a result, an unauthenticated, remote attacker may spoof request attributes evaluated by the external authentication provider. Impact: This vulnerability may allow remote attackers unauthenticated access to protected paths. There is no control plane exposure; this is a data plane issue only. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用欺骗进行的认证绕过
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
F5 NGINX Ingress Controller 5.5.0 ~ 5.7.0 -

II. Public POCs for CVE-2026-94197

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III. Intelligence Information for CVE-2026-94197

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Other References for CVE-2026-94197 (1)

Same Patch Batch · F5 · 2026-10-14 · 11 CVEs total

CVE-2026-91184 8.8 HIGH NGINX Gateway Fabric vulnerability
CVE-2026-93479 8.1 HIGH NGINX map directive and regex matching vulnerability
CVE-2026-15176 8.1 HIGH NGINX ngx_http_core_module vulnerability
CVE-2026-97205 8.1 HIGH NGINX ngx_http_core_module vulnerability
CVE-2026-104939 7.5 HIGH NGINX Ingress Controller vulnerability
CVE-2026-101019 6.5 MEDIUM NGINX ngx_http_js_module vulnerability
CVE-2026-96615 6.5 MEDIUM NGINX Gateway Fabric vulnerability
CVE-2026-97629 6.5 MEDIUM NGINX ngx_http_ssl_module vulnerability
CVE-2026-95101 5.3 MEDIUM NGINX ngx_http_v3_module vulnerability
CVE-2026-101025 5.3 MEDIUM NGINX ngx_http_js_module vulnerability

IV. Related Vulnerabilities

Same product: NGINX Ingress Controller
Same vendor: F5
Same weakness: CWE-290

V. Comments for CVE-2026-94197

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