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7.5 High

CVE-2026-104939 Description NGINX Ingress Controller has a vulnerability when implementing an externalAuth policy for ingress

Description

Description NGINX Ingress Controller has a vulnerability when implementing an externalAuth policy for ingress. NGINX Ingress Controller may mishandle the HTTP response from an OAuth IdP and allow an attacker to acquire unauthenticated access to protected paths before the proper external authentication can happen. 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.

Affected products and versions

Product Affected versions Fixed in
NGINX Ingress Controller 5.6 5.6.0 → < 5.7.0 5.7.0

References

Timeline

  1. Published
  2. Last modified

Other CVEs of NGINX Ingress Controller

The 8 CVEs of NGINX Ingress Controller →
CVE-2026-94197 An authentication and authorization bypass vulnerability exists in F5 NGINX Kubernetes Ingress Controller (NIC) when… 7.5 High CVE-2026-77180 When NGINX Ingress Controller is configured with Ingress annotations, an injection vulnerability exists in the… 8.3 High CVE-2026-52865 When NGINX Ingress Controller processes Ingress or TransportServer resources, an authenticated, remote attacker with… 6.5 Medium CVE-2026-55723 When NGINX Ingress Controller is configured with Custom Resource Definitions (CRDs) or Ingress annotations, an injection… 8.3 High
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