CVE-2026-15228 (GCVE-0-2026-15228)
Vulnerability from cvelistv5 – Published: 2026-07-29 15:28 – Updated: 2026-07-29 15:53
VLAI
EPSS
VEX
Title
Kong Kubernetes Ingress Controller cluster-wide ingress configuration DoS via CA-certificate ID collision
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
1 reference
Impacted products
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Consider using an admission webhook or OPA/Kyverno policy to enforce this label restriction.\u003c/p\u003e\u003c/li\u003e\u003cli\u003e\u003cp\u003e\u003cstrong\u003eAudit existing CA-cert Secrets\u003c/strong\u003e: Inspect Secrets labeled\u003cspan\u003e\u0026nbsp;\u003c/span\u003e\u003ccode\u003ekonghq.com/ca-cert=true\u003c/code\u003e\u003cspan\u003e\u0026nbsp;\u003c/span\u003eacross all watched namespaces for unexpected or duplicate\u003cspan\u003e\u0026nbsp;\u003c/span\u003e\u003ccode\u003edata.id\u003c/code\u003e\u003cspan\u003e\u0026nbsp;\u003c/span\u003evalues. Remove any that were not provisioned by a trusted operator.\u003c/p\u003e\u003c/li\u003e\u003c/ol\u003e\", \"base64\": false}]}], \"x_generator\": {\"engine\": \"Vulnogram 1.0.4\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"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.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eKong 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.\u003c/p\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-862\", \"description\": \"CWE-862\"}]}, {\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-400\", \"description\": \"CWE-400\"}]}], \"configurations\": [{\"lang\": \"en\", \"value\": \"You are affected if\\u00a0all\\u00a0of the following hold:\\n\\n * KIC is configured without\\u00a0`--watch-namespace\\u00a0CLI flag, causing the KIC to watch Secrets cluster-wide.\\n * Your cluster hosts\\u00a0multiple tenants\\u00a0where not all users are fully trusted.\\n * Untrusted users have RBAC permission to\\u00a0create Secrets\\u00a0in any namespace watched by the\\u00a0ControlPlane, and are not prevented from applying\\u00a0konghq.com/ca-cert=true\\u00a0labels.\\n\\n\\nYou are\\u00a0not\\u00a0affected if:\\n\\n * KIC has\\u00a0--watch-namespace\\u00a0that is set to only include trusted namespaces.\\n * RBAC policies prevent untrusted users from creating Secrets with the labels\\u00a0konghq.com/ca-cert=true\\u00a0in any namespace watched by KIC.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eYou are affected if\u003cspan\u003e\u0026nbsp;\u003c/span\u003e\u003cstrong\u003eall\u003c/strong\u003e\u003cspan\u003e\u0026nbsp;\u003c/span\u003eof the following hold:\u003c/p\u003e\u003col\u003e\u003cli\u003eKIC is configured without\u003cspan\u003e\u0026nbsp;\u003c/span\u003e\u003cstrong\u003e`--watch-namespace\u003c/strong\u003e\u003cspan\u003e\u0026nbsp;\u003c/span\u003eCLI flag, causing the KIC to watch Secrets cluster-wide.\u003c/li\u003e\u003cli\u003eYour cluster hosts\u003cspan\u003e\u0026nbsp;\u003c/span\u003e\u003cstrong\u003emultiple tenants\u003c/strong\u003e\u003cspan\u003e\u0026nbsp;\u003c/span\u003ewhere not all users are fully trusted.\u003c/li\u003e\u003cli\u003eUntrusted users have RBAC permission to\u003cspan\u003e\u0026nbsp;\u003c/span\u003e\u003cstrong\u003ecreate Secrets\u003c/strong\u003e\u003cspan\u003e\u0026nbsp;\u003c/span\u003ein any namespace watched by the\u003cspan\u003e\u0026nbsp;\u003c/span\u003e\u003ccode\u003eControlPlane\u003c/code\u003e, and are not prevented from applying\u003cspan\u003e\u0026nbsp;\u003c/span\u003e\u003ccode\u003ekonghq.com/ca-cert=true\u003c/code\u003e\u003cspan\u003e\u0026nbsp;\u003c/span\u003elabels.\u003c/li\u003e\u003c/ol\u003e\u003cp\u003eYou are\u003cspan\u003e\u0026nbsp;\u003c/span\u003e\u003cstrong\u003enot\u003c/strong\u003e\u003cspan\u003e\u0026nbsp;\u003c/span\u003eaffected if:\u003c/p\u003e\u003cul\u003e\u003cli\u003eKIC has\u003cspan\u003e\u0026nbsp;\u003c/span\u003e\u003ccode\u003e--watch-namespace\u003c/code\u003e\u003cspan\u003e\u0026nbsp;\u003c/span\u003ethat is set to only include trusted namespaces.\u003c/li\u003e\u003cli\u003eRBAC policies prevent untrusted users from creating Secrets with the labels\u003cspan\u003e\u0026nbsp;\u003c/span\u003e\u003ccode\u003ekonghq.com/ca-cert=true\u003c/code\u003e\u003cspan\u003e\u0026nbsp;\u003c/span\u003ein any namespace watched by KIC.\u003c/li\u003e\u003c/ul\u003e\", \"base64\": false}]}], \"providerMetadata\": {\"orgId\": \"02762ae7-200e-4b20-9b2b-a77d5b8fc4cb\", \"shortName\": \"Kong\", \"dateUpdated\": \"2026-07-29T15:28:30.362Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-15228\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-07-29T15:53:22.898Z\", \"dateReserved\": \"2026-07-09T10:50:51.533Z\", \"assignerOrgId\": \"02762ae7-200e-4b20-9b2b-a77d5b8fc4cb\", \"datePublished\": \"2026-07-29T15:28:30.362Z\", \"assignerShortName\": \"Kong\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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