Vulnerability · Published Jul 29, 2026 · Assigned by Kong
CVE-2026-15228Kong Kubernetes Ingress Controller cluster-wide ingress configuration DoS via CA-certificate ID collision
High 7.1
In plain English
A high-severity missing authorization in Kong/kubernetes-ingress-controller. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 14% of all known vulnerabilities).
Official description
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 products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Kong/kubernetes-ingress-controller | 3.4.0 – before 3.4.183.5.0 – before 3.5.11 |
Weakness: CWE-862, CWE-400 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N