{"api_version":"1","generated_at":"2026-08-16T16:32:48+00:00","cve":"CVE-2026-15228","urls":{"html":"https://cve.report/CVE-2026-15228","api":"https://cve.report/api/cve/CVE-2026-15228.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-15228","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-15228"},"summary":{"title":"Kong Kubernetes Ingress Controller cluster-wide ingress configuration DoS via CA-certificate ID collision","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. 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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 konghq.com/secret=true and konghq.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 konghq.com/ca-cert=true across all watched namespaces for unexpected or duplicate data.id values. Remove any that were not provisioned by a trusted operator.","time":"","lang":"en"}],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"15228","cve":"CVE-2026-15228","epss":"0.001400000","percentile":"0.038260000","score_date":"2026-08-02","updated_at":"2026-08-03 00:14:24"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"metrics":[{"other":{"content":{"id":"CVE-2026-15228","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","timestamp":"2026-07-29T15:53:16.091813Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2026-07-29T15:53:22.898Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"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"}]}],"configurations":[{"lang":"en","supportingMedia":[{"base64":false,"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>"}],"value":"You are affected if all of the following hold:\n\n  *  KIC is configured without `--watch-namespace CLI flag, causing the KIC to watch Secrets cluster-wide.\n  *  Your cluster hosts multiple tenants where not all users are fully trusted.\n  *  Untrusted users have RBAC permission to create Secrets in any namespace watched by the ControlPlane, and are not prevented from applying konghq.com/ca-cert=true labels.\n\n\nYou are not affected if:\n\n  *  KIC has --watch-namespace that is set to only include trusted namespaces.\n  *  RBAC policies prevent untrusted users from creating Secrets with the labels konghq.com/ca-cert=true in any namespace watched by KIC."}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"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. 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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>"}],"value":"*  \n\nRestrict watch scope: Set --watch-namespace (or env CONTROLLER_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 konghq.com/secret=true and konghq.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 konghq.com/ca-cert=true across all watched namespaces for unexpected or duplicate data.id values. 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"},"nvd":{"publishedDate":"2026-07-29 16:17:49","lastModifiedDate":"2026-07-30 14:15:31","problem_types":["CWE-400","CWE-862","CWE-862 CWE-862","CWE-400 CWE-400"],"metrics":{"cvssMetricV40":[{"source":"02762ae7-200e-4b20-9b2b-a77d5b8fc4cb","type":"Secondary","cvssData":{"version":"4.0","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","baseScore":7.1,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-07-29T15:53:16.091813Z","id":"CVE-2026-15228","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"15228","Ordinal":"1","Title":"Kong Kubernetes Ingress Controller cluster-wide ingress configur","CVE":"CVE-2026-15228","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"15228","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"Kong Kubernetes Ingress Controller cluster-wide ingress configur"}]}}}