{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-18679", "assignerOrgId": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb", "state": "PUBLISHED", "assignerShortName": "Kong", "dateReserved": "2026-08-03T15:20:48.055Z", "datePublished": "2026-08-12T18:52:31.146Z", "dateUpdated": "2026-08-12T18:52:31.146Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb", "shortName": "Kong", "dateUpdated": "2026-08-12T18:52:31.146Z"}, "title": "Kong Mesh: kuma-dp connects to the control plane without verifying the TLS certificate when no CA is configured", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-295", "description": "CWE-295 Improper Certificate Validation", "type": "CWE"}]}], "impacts": [{"descriptions": [{"lang": "en", "value": "Control plane impersonation"}]}], "affected": [{"vendor": "Kong Inc.", "product": "Kong Mesh", "platforms": ["Linux"], "modules": ["kuma-dp"], "versions": [{"status": "affected", "version": "0", "lessThan": "2.7.26", "versionType": "semver"}, {"status": "affected", "version": "2.8.0", "lessThan": "2.9.16", "versionType": "semver"}, {"status": "affected", "version": "2.10.0", "lessThan": "2.11.14", "versionType": "semver"}, {"status": "affected", "version": "2.12.0", "lessThan": "2.12.11", "versionType": "semver"}, {"status": "affected", "version": "2.13.0", "lessThan": "2.13.7", "versionType": "semver"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "When kuma-dp is started against an HTTPS control plane and the operator did not pass a CA certificate, the data plane connects with TLS peer verification disabled, and the dataplane authentication token is sent over that unverified connection.\n\n\n\nAn on-path actor can intercept the dataplane authentication token and impersonate the control plane to the data plane, injecting a forged bootstrap configuration and taking over the proxy.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>When <code>kuma-dp</code> is started against an HTTPS control plane and the operator did not pass a CA certificate, the data plane connects with TLS peer verification disabled, and the dataplane authentication token is sent over that unverified connection.</p><p>An on-path actor can intercept the dataplane authentication token and impersonate the control plane to the data plane, injecting a forged bootstrap configuration and taking over the proxy.</p>"}]}], "references": [{"url": "https://github.com/kumahq/kuma/security/advisories/GHSA-wvmp-6r4v-j6cv", "name": "Upstream advisory GHSA-wvmp-6r4v-j6cv", "tags": ["vendor-advisory"]}, {"url": "https://github.com/kumahq/kuma/pull/16777", "name": "kumahq/kuma#16777 (master)", "tags": ["patch"]}, {"url": "https://developer.konghq.com/mesh/changelog/", "name": "Kong MESH Changelog", "tags": ["release-notes"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "ADJACENT", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "subConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "subIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "NONE", "subAvailabilityImpact": "HIGH", "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": "MEDIUM", "baseScore": 5.8, "vectorString": "CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H"}}], "configurations": [{"lang": "en", "value": "You are affected if you run universal mode kuma-dp against an HTTPS control plane without --ca-cert-file, or with KUMA_CONTROL_PLANE_CA_CERT unset.\n\n\n\nYou are not affected if you install on Kubernetes through kumactl install control-plane or the official Kong Mesh Helm chart. In both cases the control plane's mutating admission webhook injects KUMA_CONTROL_PLANE_CA_CERT into every sidecar at pod admission, so each kuma-dp starts with the CA already configured.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>You are affected if you run universal mode <code>kuma-dp</code> against an HTTPS control plane without <code>--ca-cert-file</code>, or with <code>KUMA_CONTROL_PLANE_CA_CERT</code> unset.</p><p>You are not affected if you install on Kubernetes through <code>kumactl install control-plane</code> or the official Kong Mesh Helm chart. In both cases the control plane's mutating admission webhook injects <code>KUMA_CONTROL_PLANE_CA_CERT</code> into every sidecar at pod admission, so each <code>kuma-dp</code> starts with the CA already configured.</p>"}]}], "workarounds": [{"lang": "en", "value": "Set --ca-cert-file, or KUMA_CONTROL_PLANE_CA_CERT, on every universal mode data plane and point it at the control plane's serving CA. Alternatively terminate the control plane behind a publicly trusted certificate.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>Set <code>--ca-cert-file</code>, or <code>KUMA_CONTROL_PLANE_CA_CERT</code>, on every universal mode data plane and point it at the control plane's serving CA. Alternatively terminate the control plane behind a publicly trusted certificate.</p>"}]}], "solutions": [{"lang": "en", "value": "Upgrade to Kong Mesh 2.7.26, 2.9.16, 2.11.14, 2.12.11 or 2.13.7, whichever matches your release line. Patched releases fall back to the operating system trust store instead of disabling verification, so a publicly trusted control plane certificate verifies with no further configuration. The 2.14 line shipped after the fix and was never affected.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>Upgrade to Kong Mesh 2.7.26, 2.9.16, 2.11.14, 2.12.11 or 2.13.7, whichever matches your release line. Patched releases fall back to the operating system trust store instead of disabling verification, so a publicly trusted control plane certificate verifies with no further configuration. The 2.14 line shipped after the fix and was never affected.</p>"}]}], "timeline": [{"time": "2026-06-03T20:20:00.000Z", "lang": "en", "value": "Kong Mesh patched releases published"}, {"time": "2026-07-16T16:42:00.000Z", "lang": "en", "value": "Upstream advisory GHSA-wvmp-6r4v-j6cv published"}], "source": {"discovery": "INTERNAL"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "modules": ["kuma-dp"], "platforms": ["Linux"], "product": "Kong Mesh", "vendor": "Kong Inc.", "versions": [{"lessThan": "2.7.26", "status": "affected", "version": "0", "versionType": "semver"}, {"lessThan": "2.9.16", "status": "affected", "version": "2.8.0", "versionType": "semver"}, {"lessThan": "2.11.14", "status": "affected", "version": "2.10.0", "versionType": "semver"}, {"lessThan": "2.12.11", "status": "affected", "version": "2.12.0", "versionType": "semver"}, {"lessThan": "2.13.7", "status": "affected", "version": "2.13.0", "versionType": "semver"}]}], "source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "When kuma-dp is started against an HTTPS control plane and the operator did not pass a CA certificate, the data plane connects with TLS peer verification disabled, and the dataplane authentication token is sent over that unverified connection.\n\n\n\nAn on-path actor can intercept the dataplane authentication token and impersonate the control plane to the data plane, injecting a forged bootstrap configuration and taking over the proxy."}], "id": "CVE-2026-18679", "lastModified": "2026-08-12T20:17:41.957", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "attackVector": "ADJACENT", "availabilityRequirement": "NOT_DEFINED", "baseScore": 5.8, "baseSeverity": "MEDIUM", "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": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "HIGH", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/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": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb", "type": "Secondary"}]}, "published": "2026-08-12T20:17:41.957", "references": [{"source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb", "url": "https://developer.konghq.com/mesh/changelog/"}, {"source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb", "url": "https://github.com/kumahq/kuma/pull/16777"}, {"source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb", "url": "https://github.com/kumahq/kuma/security/advisories/GHSA-wvmp-6r4v-j6cv"}], "sourceIdentifier": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-295"}], "source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb", "type": "Secondary"}]}

{}

{}