Kong Kubernetes Ingress Controller cluster-wide ingress configuration DoS via CA-certificate ID collision
Summary
| CVE | CVE-2026-15228 |
|---|---|
| State | PUBLISHED |
| Assigner | Kong |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-07-29 16:17:49 UTC |
| Updated | 2026-07-30 14:15:31 UTC |
| 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. |
Risk And Classification
Primary CVSS: v4.0 7.1 HIGH from 02762ae7-200e-4b20-9b2b-a77d5b8fc4cb
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS: 0.001400000 probability, percentile 0.038260000 (date 2026-08-02)
Problem Types: CWE-400 | CWE-862 | CWE-862 CWE-862 | CWE-400 CWE-400
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | 02762ae7-200e-4b20-9b2b-a77d5b8fc4cb | Secondary | 7.1 | HIGH | 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/E:X/C... |
| 4.0 | CNA | CVSS | 7.1 | HIGH | 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 |
CVSS v4.0 Breakdown
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| github.com/Kong/kubernetes-ingress-controller/security/advisories/GHSA-g... | 02762ae7-200e-4b20-9b2b-a77d5b8fc4cb | github.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Additional Advisory Data
Solutions
CNA: Users should upgrade to the patched version of KIC (3.4.18; 3.5.11)
Workarounds
CNA: * Restrict watch scope: Set --watch-namespace (or env CONTROLLER_WATCH_NAMESPACE) to only include trusted namespaces. This prevents the embedded KIC from ingesting Secrets from untrusted namespaces. * Restrict Secret labeling via RBAC: Use Kubernetes RBAC to prevent untrusted users from creating or modifying Secrets with the labels konghq.com/secret=true and konghq.com/ca-cert=true. Consider using an admission webhook or OPA/Kyverno policy to enforce this label restriction. * Audit existing CA-cert Secrets: Inspect Secrets labeled konghq.com/ca-cert=true across all watched namespaces for unexpected or duplicate data.id values. Remove any that were not provisioned by a trusted operator.