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

Quick assessment

Affected
CVE-2026-15228
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Kong Kong Ingress Controller for Kubernetes是Kong组织开源的一个容器集群的入口控制器。 Kong Ingress Controller for Kubernetes 3.4.0版本至3.4.18之前版本和3.5.0版本至3.5.11之前版本存在安全漏洞，该漏洞源于使用标签选择器收集CA证书Secret时未限制命名空间，导致用户可创建重复CA证书ID，造成Kong Gateway拒绝配置文档并停止所有入口更改，形成拒绝服务。

CVSS 7.1 · High EPSS 0.23% · P12

Affected Version Matrix 2

VendorProduct Version RangeStatus
None None 3.4.0< 3.4.18 affected
3.5.0< 3.5.11 affected

I. Basic Information for CVE-2026-15228

Vulnerability Information
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Vulnerability Title
Kong Kubernetes Ingress Controller cluster-wide ingress configuration DoS via CA-certificate ID collision
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Kong Ingress Controller for Kubernetes 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Kong Kong Ingress Controller for Kubernetes是Kong组织开源的一个容器集群的入口控制器。 Kong Ingress Controller for Kubernetes 3.4.0版本至3.4.18之前版本和3.5.0版本至3.5.11之前版本存在安全漏洞，该漏洞源于使用标签选择器收集CA证书Secret时未限制命名空间，导致用户可创建重复CA证书ID，造成Kong Gateway拒绝配置文档并停止所有入口更改，形成拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
- - 3.4.0 ~ 3.4.18 -

II. Public POCs for CVE-2026-15228

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 6076 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-15228

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Vendor Advisories for CVE-2026-15228 (1)

IV. Related Vulnerabilities

Same weakness: CWE-862

V. Comments for CVE-2026-15228

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