CVE-2026-104939 — NGINX Ingress Controller vulnerability

Description (CNA)

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 (CNA)

Vendor / product	Versions
F5 / NGINX Ingress Controller	affected 5.6.0 before 5.7.0

CWE

CWE-303

References

https://my.f5.com/manage/s/article/K000162617

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.