Vulnerability-Lookup

CVE-2026-15228 (GCVE-0-2026-15228)

Vulnerability from cvelistv5 – Published: 2026-07-29 15:28 – Updated: 2026-07-29 15:53

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

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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-29 15:53 UTC

CWE

Assigner

Kong mitre root

References

1 reference

URL	Tags
https://github.com/Kong/kubernetes-ingress-contro…

Impacted products

1 product

Vendor	Product	Version	CPE status
		Affected: 3.4.0 , < 3.4.18 (semver) Affected: 3.5.0 , < 3.5.11 (semver)

Show details on NVD website

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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"
    }
  }
}

FKIE_CVE-2026-15228

Vulnerability from fkie_nvd - Published: 2026-07-29 16:17 - Updated: 2026-07-30 14:15

Severity

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

Summary

References

	URL	Tags
	02762ae7-200e-4b20-9b2b-a77d5b8fc4cb	https://github.com/Kong/kubernetes-ingress-controller/security/advisories/GHSA-g9h6-h2xj-mf78

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://github.com",
          "defaultStatus": "unaffected",
          "packageName": "Kong/kubernetes-ingress-controller",
          "repo": "https://github.com/Kong/kubernetes-ingress-controller",
          "versions": [
            {
              "lessThan": "3.4.18",
              "status": "affected",
              "version": "3.4.0",
              "versionType": "semver"
            },
            {
              "lessThan": "3.5.11",
              "status": "affected",
              "version": "3.5.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb"
    }
  ],
  "cveTags": [],
  "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."
    }
  ],
  "id": "CVE-2026-15228",
  "lastModified": "2026-07-30T14:15:31.167",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 7.1,
          "baseSeverity": "HIGH",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "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/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "HIGH",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-15228",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-07-29T15:53:16.091813Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-07-29T16:17:49.723",
  "references": [
    {
      "source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb",
      "url": "https://github.com/Kong/kubernetes-ingress-controller/security/advisories/GHSA-g9h6-h2xj-mf78"
    }
  ],
  "sourceIdentifier": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        },
        {
          "lang": "en",
          "value": "CWE-862"
        }
      ],
      "source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb",
      "type": "Secondary"
    }
  ]
}

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.

Detection rules are retrieved from Rulezet.

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.

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.