CVE-2026-15228 — Kong Kubernetes Ingress Controller cluster-wide ingress configuration DoS via CA-certificate ID collision

Description (CNA)

Kong Kubernetes Ingress Controller (KIC) allows a user with namespace-scoped Secret creation privileges to cause a cluster-wide ingress configuration denial of service. KIC collects CA-certificate Secrets across all watched namespaces using a label selector alone, without ingress-class or namespace restrictions. The CA-certificate primary key is derived from a user-supplied field in the Secret. Duplicate CA-certificate IDs cause Kong Gateway to reject the entire configuration document and halting all ingress changes cluster-wide.

Affected (CNA)

Vendor / product	Versions
Not supplied / Not supplied	affected 3.4.0 before 3.4.18; affected 3.5.0 before 3.5.11

CWE

CWE-862, CWE-400

References

https://github.com/Kong/kubernetes-ingress-controller/security/advisories/GHSA-g9h6-h2xj-mf78

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.