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 · CISA-ADP (v2.0.3)
Decision recorded 2026-07-29 15:53 UTC
Assigner
References
1 reference
Impacted products
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"value": "Denial of Service"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"exploitMaturity": "NOT_DEFINED",
"privilegesRequired": "LOW",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "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",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-862",
"description": "CWE-862",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-400",
"description": "CWE-400",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-07-29T15:28:30.362Z",
"orgId": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb",
"shortName": "Kong"
},
"references": [
{
"url": "https://github.com/Kong/kubernetes-ingress-controller/security/advisories/GHSA-g9h6-h2xj-mf78"
}
],
"solutions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cspan\u003eUsers should upgrade to the patched version of KIC (3.4.18; 3.5.11)\u003c/span\u003e"
}
],
"value": "Users should upgrade to the patched version of KIC (3.4.18; 3.5.11)"
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "Kong Kubernetes Ingress Controller cluster-wide ingress configuration DoS via CA-certificate ID collision",
"workarounds": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003col\u003e\u003cli\u003e\u003cp\u003e\u003cstrong\u003eRestrict watch scope\u003c/strong\u003e: Set\u003cspan\u003e\u0026nbsp;\u003c/span\u003e\u003ccode\u003e--watch-namespace\u003c/code\u003e\u003cspan\u003e\u0026nbsp;\u003c/span\u003e(or env\u003cspan\u003e\u0026nbsp;\u003c/span\u003e\u003ccode\u003eCONTROLLER_WATCH_NAMESPACE\u003c/code\u003e) to only include trusted namespaces. This prevents the embedded KIC from ingesting Secrets from untrusted namespaces.\u003c/p\u003e\u003c/li\u003e\u003cli\u003e\u003cp\u003e\u003cstrong\u003eRestrict Secret labeling via RBAC\u003c/strong\u003e: Use Kubernetes RBAC to prevent untrusted users from creating or modifying Secrets with the labels\u003cspan\u003e\u0026nbsp;\u003c/span\u003e\u003ccode\u003ekonghq.com/secret=true\u003c/code\u003e\u003cspan\u003e\u0026nbsp;\u003c/span\u003eand\u003cspan\u003e\u0026nbsp;\u003c/span\u003e\u003ccode\u003ekonghq.com/ca-cert=true\u003c/code\u003e. 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"
}
],
"value": "* \n\nRestrict watch scope: Set\u00a0--watch-namespace\u00a0(or env\u00a0CONTROLLER_WATCH_NAMESPACE) to only include trusted namespaces. This prevents the embedded KIC from ingesting Secrets from untrusted namespaces.\n\n\n * \n\nRestrict Secret labeling via RBAC: Use Kubernetes RBAC to prevent untrusted users from creating or modifying Secrets with the labels\u00a0konghq.com/secret=true\u00a0and\u00a0konghq.com/ca-cert=true. Consider using an admission webhook or OPA/Kyverno policy to enforce this label restriction.\n\n\n * \n\nAudit existing CA-cert Secrets: Inspect Secrets labeled\u00a0konghq.com/ca-cert=true\u00a0across all watched namespaces for unexpected or duplicate\u00a0data.id\u00a0values. Remove any that were not provisioned by a trusted operator."
}
],
"x_generator": {
"engine": "Vulnogram 1.0.4"
}
}
},
"cveMetadata": {
"assignerOrgId": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb",
"assignerShortName": "Kong",
"cveId": "CVE-2026-15228",
"datePublished": "2026-07-29T15:28:30.362Z",
"dateReserved": "2026-07-09T10:50:51.533Z",
"dateUpdated": "2026-07-29T15:53:22.898Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.
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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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.