CVE-2026-94197 (GCVE-0-2026-94197)

Vulnerability from cvelistv5 – Published: 2026-10-14 14:40 – Updated: 2026-10-14 14:40
VLAI
Title
NGINX Ingress Controller vulnerability
Summary
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.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
CWE
  • CWE-290 - Authentication Bypass by Spoofing
Assigner
f5 CNA under the mitre root
CNA scorecard B 84/100 over 87 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
F5 NGINX Ingress Controller Affected: 5.5.0 , < 5.7.0 (custom)
guessed Create a notification for this product.
Date Public
2026-10-14 14:00
Credits
F5 acknowledges Luke Granto for bringing this issue to our attention and following the highest standards of coordinated disclosure.
Show details on NVD website
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}



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