CVE-2026-18677

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-18677", "assignerOrgId": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb", "state": "PUBLISHED", "assignerShortName": "Kong", "dateReserved": "2026-08-03T15:20:45.630Z", "datePublished": "2026-08-12T18:47:06.710Z", "dateUpdated": "2026-08-13T14:49:27.614Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb", "shortName": "Kong", "dateUpdated": "2026-08-12T18:47:06.710Z"}, "title": "Kong Mesh: a dataplane token without a workload binding can claim any workload's SPIFFE identity", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-290", "description": "CWE-290 Authentication Bypass by Spoofing", "type": "CWE"}]}], "impacts": [{"descriptions": [{"lang": "en", "value": "Workload identity spoofing"}]}], "affected": [{"vendor": "Kong Inc.", "product": "Kong Mesh", "platforms": ["Linux"], "modules": ["kuma-cp"], "versions": [{"status": "affected", "version": "2.13.0", "lessThan": "2.13.10", "versionType": "semver"}, {"status": "affected", "version": "2.14.0", "lessThan": "2.14.2", "versionType": "semver"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "In Kong Mesh running in universal mode with a MeshIdentity whose SPIFFE ID path template derives from the dataplane's kuma.io/workload label, the XDS authenticator in kuma-cp validates that label only when the dataplane token is bound to a workload. Workload binding is optional, so a dataplane presenting a tags-bound token can register with kuma.io/workload set to any value and obtain another workload's SPIFFE identity.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>In Kong Mesh running in universal mode with a <code>MeshIdentity</code> whose SPIFFE ID path template derives from the dataplane's <code>kuma.io/workload</code> label, the XDS authenticator in <code>kuma-cp</code> validates that label only when the dataplane token is bound to a workload. Workload binding is optional, so a dataplane presenting a tags-bound token can register with <code>kuma.io/workload</code> set to any value and obtain another workload's SPIFFE identity.</p>"}]}], "references": [{"url": "https://github.com/kumahq/kuma/security/advisories/GHSA-744g-c785-x65q", "name": "Upstream advisory GHSA-744g-c785-x65q", "tags": ["vendor-advisory"]}, {"url": "https://github.com/kumahq/kuma/pull/17474", "name": "kumahq/kuma#17474 (master)", "tags": ["patch"]}, {"url": "https://github.com/kumahq/kuma/pull/17503", "name": "kumahq/kuma#17503 (release-2.13 backport)", "tags": ["patch"]}, {"url": "https://github.com/kumahq/kuma/pull/17502", "name": "kumahq/kuma#17502 (release-2.14 backport)", "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": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "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": "MEDIUM", "baseScore": 6, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N"}}], "configurations": [{"lang": "en", "value": "You are affected if all of the following hold:\n\n * The control plane runs in universal mode.\n * A MeshIdentity is configured whose SPIFFE ID path template derives from the workload label, including the default universal template /workload/{{ .Workload }}.\n * Dataplanes authenticate with tokens that are not bound to a workload (tags-bound tokens, the common case, since workload binding is newer and optional).\n\n\n\n\nYou are not affected if:\n\n * The control plane runs in Kubernetes mode. Its identity template is /ns/{{ .Namespace }}/sa/{{ .ServiceAccount }}, and the control plane derives those values from the pod's real identity rather than from a label the workload sets.\n * Your MeshIdentity uses a SPIFFE template that does not reference the workload label.\n * Every dataplane whose identity derives from the workload label already uses a workload-bound token.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>You are affected if all of the following hold:</p><ul><li>The control plane runs in universal mode.</li><li>A <code>MeshIdentity</code> is configured whose SPIFFE ID path template derives from the workload label, including the default universal template <code>/workload/{{ .Workload }}</code>.</li><li>Dataplanes authenticate with tokens that are not bound to a workload (tags-bound tokens, the common case, since workload binding is newer and optional).</li></ul><p>You are not affected if:</p><ul><li>The control plane runs in Kubernetes mode. Its identity template is <code>/ns/{{ .Namespace }}/sa/{{ .ServiceAccount }}</code>, and the control plane derives those values from the pod's real identity rather than from a label the workload sets.</li><li>Your <code>MeshIdentity</code> uses a SPIFFE template that does not reference the workload label.</li><li>Every dataplane whose identity derives from the workload label already uses a workload-bound token.</li></ul>"}]}], "workarounds": [{"lang": "en", "value": "Issue workload-bound dataplane tokens for every dataplane whose identity derives from the kuma.io/workload label. A workload-bound token constrains that label to the bound value, so a mismatched label is rejected at authentication.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>Issue workload-bound dataplane tokens for every dataplane whose identity derives from the <code>kuma.io/workload</code> label. A workload-bound token constrains that label to the bound value, so a mismatched label is rejected at authentication.</p>"}]}], "solutions": [{"lang": "en", "value": "Upgrade to Kong Mesh 2.13.10 or 2.14.2, whichever matches your release line. In patched versions a dataplane whose identity derives from the kuma.io/workload label requires a workload-bound token; an unbound tags-only token is rejected at XDS authentication. Kubernetes mode and universal templates that do not reference the workload label keep working with unbound tokens.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>Upgrade to Kong Mesh 2.13.10 or 2.14.2, whichever matches your release line. In patched versions a dataplane whose identity derives from the <code>kuma.io/workload</code> label requires a workload-bound token; an unbound tags-only token is rejected at XDS authentication. Kubernetes mode and universal templates that do not reference the workload label keep working with unbound tokens.</p>"}]}], "timeline": [{"time": "2026-08-01T16:58:00.000Z", "lang": "en", "value": "Kong Mesh 2.13.10 and 2.14.2 published"}], "credits": [{"lang": "en", "value": "kanywst", "type": "finder"}], "source": {"discovery": "EXTERNAL"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-08-13T14:49:14.103209Z", "id": "CVE-2026-18677", "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": "2026-08-13T14:49:27.614Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-18677", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-08-13T14:49:14.103209Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-13T14:49:24.390Z"}}], "cna": {"title": "Kong Mesh: a dataplane token without a workload binding can claim any workload's SPIFFE identity", "source": {"discovery": "EXTERNAL"}, "credits": [{"lang": "en", "type": "finder", "value": "kanywst"}], "impacts": [{"descriptions": [{"lang": "en", "value": "Workload identity spoofing"}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 6, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "LOW", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"vendor": "Kong Inc.", "modules": ["kuma-cp"], "product": "Kong Mesh", "versions": [{"status": "affected", "version": "2.13.0", "lessThan": "2.13.10", "versionType": "semver"}, {"status": "affected", "version": "2.14.0", "lessThan": "2.14.2", "versionType": "semver"}], "platforms": ["Linux"], "defaultStatus": "unaffected"}], "timeline": [{"lang": "en", "time": "2026-08-01T16:58:00.000Z", "value": "Kong Mesh 2.13.10 and 2.14.2 published"}], "solutions": [{"lang": "en", "value": "Upgrade to Kong Mesh 2.13.10 or 2.14.2, whichever matches your release line. 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Kubernetes mode and universal templates that do not reference the workload label keep working with unbound tokens.</p>", "base64": false}]}], "references": [{"url": "https://github.com/kumahq/kuma/security/advisories/GHSA-744g-c785-x65q", "name": "Upstream advisory GHSA-744g-c785-x65q", "tags": ["vendor-advisory"]}, {"url": "https://github.com/kumahq/kuma/pull/17474", "name": "kumahq/kuma#17474 (master)", "tags": ["patch"]}, {"url": "https://github.com/kumahq/kuma/pull/17503", "name": "kumahq/kuma#17503 (release-2.13 backport)", "tags": ["patch"]}, {"url": "https://github.com/kumahq/kuma/pull/17502", "name": "kumahq/kuma#17502 (release-2.14 backport)", "tags": ["patch"]}, {"url": "https://developer.konghq.com/mesh/changelog/", "name": "Kong MESH Changelog", "tags": ["release-notes"]}], "workarounds": [{"lang": "en", "value": "Issue workload-bound dataplane tokens for every dataplane whose identity derives from the kuma.io/workload label. A workload-bound token constrains that label to the bound value, so a mismatched label is rejected at authentication.", "supportingMedia": [{"type": "text/html", "value": "<p>Issue workload-bound dataplane tokens for every dataplane whose identity derives from the <code>kuma.io/workload</code> label. A workload-bound token constrains that label to the bound value, so a mismatched label is rejected at authentication.</p>", "base64": false}]}], "descriptions": [{"lang": "en", "value": "In Kong Mesh running in universal mode with a MeshIdentity whose SPIFFE ID path template derives from the dataplane's kuma.io/workload label, the XDS authenticator in kuma-cp validates that label only when the dataplane token is bound to a workload. Workload binding is optional, so a dataplane presenting a tags-bound token can register with kuma.io/workload set to any value and obtain another workload's SPIFFE identity.", "supportingMedia": [{"type": "text/html", "value": "<p>In Kong Mesh running in universal mode with a <code>MeshIdentity</code> whose SPIFFE ID path template derives from the dataplane's <code>kuma.io/workload</code> label, the XDS authenticator in <code>kuma-cp</code> validates that label only when the dataplane token is bound to a workload. Workload binding is optional, so a dataplane presenting a tags-bound token can register with <code>kuma.io/workload</code> set to any value and obtain another workload's SPIFFE identity.</p>", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-290", "description": "CWE-290 Authentication Bypass by Spoofing"}]}], "configurations": [{"lang": "en", "value": "You are affected if all of the following hold:\n\n * The control plane runs in universal mode.\n * A MeshIdentity is configured whose SPIFFE ID path template derives from the workload label, including the default universal template /workload/{{ .Workload }}.\n * Dataplanes authenticate with tokens that are not bound to a workload (tags-bound tokens, the common case, since workload binding is newer and optional).\n\n\n\n\nYou are not affected if:\n\n * The control plane runs in Kubernetes mode. Its identity template is /ns/{{ .Namespace }}/sa/{{ .ServiceAccount }}, and the control plane derives those values from the pod's real identity rather than from a label the workload sets.\n * Your MeshIdentity uses a SPIFFE template that does not reference the workload label.\n * Every dataplane whose identity derives from the workload label already uses a workload-bound token.", "supportingMedia": [{"type": "text/html", "value": "<p>You are affected if all of the following hold:</p><ul><li>The control plane runs in universal mode.</li><li>A <code>MeshIdentity</code> is configured whose SPIFFE ID path template derives from the workload label, including the default universal template <code>/workload/{{ .Workload }}</code>.</li><li>Dataplanes authenticate with tokens that are not bound to a workload (tags-bound tokens, the common case, since workload binding is newer and optional).</li></ul><p>You are not affected if:</p><ul><li>The control plane runs in Kubernetes mode. Its identity template is <code>/ns/{{ .Namespace }}/sa/{{ .ServiceAccount }}</code>, and the control plane derives those values from the pod's real identity rather than from a label the workload sets.</li><li>Your <code>MeshIdentity</code> uses a SPIFFE template that does not reference the workload label.</li><li>Every dataplane whose identity derives from the workload label already uses a workload-bound token.</li></ul>", "base64": false}]}], "providerMetadata": {"orgId": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb", "shortName": "Kong", "dateUpdated": "2026-08-12T18:47:06.710Z"}}}, "cveMetadata": {"cveId": "CVE-2026-18677", "state": "PUBLISHED", "dateUpdated": "2026-08-13T14:49:27.614Z", "dateReserved": "2026-08-03T15:20:45.630Z", "assignerOrgId": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb", "datePublished": "2026-08-12T18:47:06.710Z", "assignerShortName": "Kong"}, "dataVersion": "5.2"}

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{}

{"affected": [{"configurations": [{"platform": ["linux"], "status": "affected", "versions": {"scheme": "semver", "value": "[2.13.0,2.13.10)"}}, {"platform": ["linux"], "status": "affected", "versions": {"scheme": "semver", "value": "[2.14.0,2.14.2)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "Kong Mesh", "source": "cna", "vendor": "Kong Inc."}, "product": "kong_mesh", "vendor": "konghq"}], "created": "2026-08-13T00:00:09.075510+00:00", "updated": "2026-08-13T09:48:07.860124+00:00", "vendors": ["konghq", "konghq$PRODUCT$kong_mesh"]}