CVE-2026-15228

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-15228", "assignerOrgId": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb", "state": "PUBLISHED", "assignerShortName": "Kong", "dateReserved": "2026-07-09T10:50:51.533Z", "datePublished": "2026-07-29T15:28:30.362Z", "dateUpdated": "2026-07-29T15:53:22.898Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb", "shortName": "Kong", "dateUpdated": "2026-07-29T15:28:30.362Z"}, "title": "Kong Kubernetes Ingress Controller cluster-wide ingress configuration DoS via CA-certificate ID collision", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-862", "description": "CWE-862", "type": "CWE"}]}, {"descriptions": [{"lang": "en", "cweId": "CWE-400", "description": "CWE-400", "type": "CWE"}]}], "impacts": [{"capecId": "CAPEC-240", "descriptions": [{"lang": "en", "value": "CAPEC-240 Resource Injection"}]}, {"descriptions": [{"lang": "en", "value": "Denial of Service"}]}], "affected": [{"collectionURL": "https://github.com", "packageName": "Kong/kubernetes-ingress-controller", "repo": "https://github.com/Kong/kubernetes-ingress-controller", "versions": [{"status": "affected", "version": "3.4.0", "lessThan": "3.4.18", "versionType": "semver"}, {"status": "affected", "version": "3.5.0", "lessThan": "3.5.11", "versionType": "semver"}], "defaultStatus": "unaffected"}], "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", "base64": false, "value": "<p>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.</p>"}]}], "references": [{"url": "https://github.com/Kong/kubernetes-ingress-controller/security/advisories/GHSA-g9h6-h2xj-mf78"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "HIGH", "baseScore": 7.1, "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"}}], "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", "base64": false, "value": "<p>You are affected if<span>&nbsp;</span><strong>all</strong><span>&nbsp;</span>of the following hold:</p><ol><li>KIC is configured without<span>&nbsp;</span><strong>`--watch-namespace</strong><span>&nbsp;</span>CLI flag, causing the KIC to watch Secrets cluster-wide.</li><li>Your cluster hosts<span>&nbsp;</span><strong>multiple tenants</strong><span>&nbsp;</span>where not all users are fully trusted.</li><li>Untrusted users have RBAC permission to<span>&nbsp;</span><strong>create Secrets</strong><span>&nbsp;</span>in any namespace watched by the<span>&nbsp;</span><code>ControlPlane</code>, and are not prevented from applying<span>&nbsp;</span><code>konghq.com/ca-cert=true</code><span>&nbsp;</span>labels.</li></ol><p>You are<span>&nbsp;</span><strong>not</strong><span>&nbsp;</span>affected if:</p><ul><li>KIC has<span>&nbsp;</span><code>--watch-namespace</code><span>&nbsp;</span>that is set to only include trusted namespaces.</li><li>RBAC policies prevent untrusted users from creating Secrets with the labels<span>&nbsp;</span><code>konghq.com/ca-cert=true</code><span>&nbsp;</span>in any namespace watched by KIC.</li></ul>"}]}], "workarounds": [{"lang": "en", "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.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<ol><li><p><strong>Restrict watch scope</strong>: Set<span>&nbsp;</span><code>--watch-namespace</code><span>&nbsp;</span>(or env<span>&nbsp;</span><code>CONTROLLER_WATCH_NAMESPACE</code>) to only include trusted namespaces. This prevents the embedded KIC from ingesting Secrets from untrusted namespaces.</p></li><li><p><strong>Restrict Secret labeling via RBAC</strong>: Use Kubernetes RBAC to prevent untrusted users from creating or modifying Secrets with the labels<span>&nbsp;</span><code>konghq.com/secret=true</code><span>&nbsp;</span>and<span>&nbsp;</span><code>konghq.com/ca-cert=true</code>. Consider using an admission webhook or OPA/Kyverno policy to enforce this label restriction.</p></li><li><p><strong>Audit existing CA-cert Secrets</strong>: Inspect Secrets labeled<span>&nbsp;</span><code>konghq.com/ca-cert=true</code><span>&nbsp;</span>across all watched namespaces for unexpected or duplicate<span>&nbsp;</span><code>data.id</code><span>&nbsp;</span>values. Remove any that were not provisioned by a trusted operator.</p></li></ol>"}]}], "solutions": [{"lang": "en", "value": "Users should upgrade to the patched version of KIC (3.4.18; 3.5.11)", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<span>Users should upgrade to the patched version of KIC (3.4.18; 3.5.11)</span>"}]}], "source": {"discovery": "EXTERNAL"}, "x_generator": {"engine": "Vulnogram 1.0.4"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-07-29T15:53:16.091813Z", "id": "CVE-2026-15228", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-29T15:53:22.898Z"}}]}}

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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.", "supportingMedia": [{"type": "text/html", "value": "<ol><li><p><strong>Restrict watch scope</strong>: Set<span>&nbsp;</span><code>--watch-namespace</code><span>&nbsp;</span>(or env<span>&nbsp;</span><code>CONTROLLER_WATCH_NAMESPACE</code>) to only include trusted namespaces. This prevents the embedded KIC from ingesting Secrets from untrusted namespaces.</p></li><li><p><strong>Restrict Secret labeling via RBAC</strong>: Use Kubernetes RBAC to prevent untrusted users from creating or modifying Secrets with the labels<span>&nbsp;</span><code>konghq.com/secret=true</code><span>&nbsp;</span>and<span>&nbsp;</span><code>konghq.com/ca-cert=true</code>. Consider using an admission webhook or OPA/Kyverno policy to enforce this label restriction.</p></li><li><p><strong>Audit existing CA-cert Secrets</strong>: Inspect Secrets labeled<span>&nbsp;</span><code>konghq.com/ca-cert=true</code><span>&nbsp;</span>across all watched namespaces for unexpected or duplicate<span>&nbsp;</span><code>data.id</code><span>&nbsp;</span>values. Remove any that were not provisioned by a trusted operator.</p></li></ol>", "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": "<p>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.</p>", "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": "<p>You are affected if<span>&nbsp;</span><strong>all</strong><span>&nbsp;</span>of the following hold:</p><ol><li>KIC is configured without<span>&nbsp;</span><strong>`--watch-namespace</strong><span>&nbsp;</span>CLI flag, causing the KIC to watch Secrets cluster-wide.</li><li>Your cluster hosts<span>&nbsp;</span><strong>multiple tenants</strong><span>&nbsp;</span>where not all users are fully trusted.</li><li>Untrusted users have RBAC permission to<span>&nbsp;</span><strong>create Secrets</strong><span>&nbsp;</span>in any namespace watched by the<span>&nbsp;</span><code>ControlPlane</code>, and are not prevented from applying<span>&nbsp;</span><code>konghq.com/ca-cert=true</code><span>&nbsp;</span>labels.</li></ol><p>You are<span>&nbsp;</span><strong>not</strong><span>&nbsp;</span>affected if:</p><ul><li>KIC has<span>&nbsp;</span><code>--watch-namespace</code><span>&nbsp;</span>that is set to only include trusted namespaces.</li><li>RBAC policies prevent untrusted users from creating Secrets with the labels<span>&nbsp;</span><code>konghq.com/ca-cert=true</code><span>&nbsp;</span>in any namespace watched by KIC.</li></ul>", "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"}, "dataVersion": "5.2"}

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{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 80.0, "confidence_source": "inferred", "scores": [{"score": 80.0, "source": "inferred"}]}, "product": "kubernetes_ingress_controller", "vendor": "kong"}], "created": "2026-07-30T15:29:01.530703+00:00", "updated": "2026-08-03T13:30:04.525962+00:00", "vendors": ["kong", "kong$PRODUCT$kubernetes_ingress_controller"]}