247 lines
13 KiB
JSON
247 lines
13 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-18677",
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"assignerOrgId": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb",
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"state": "PUBLISHED",
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"assignerShortName": "Kong",
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"dateReserved": "2026-08-03T15:20:45.630Z",
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"datePublished": "2026-08-12T18:47:06.710Z",
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"dateUpdated": "2026-08-13T14:49:27.614Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb",
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"shortName": "Kong",
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"dateUpdated": "2026-08-12T18:47:06.710Z"
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},
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"title": "Kong Mesh: a dataplane token without a workload binding can claim any workload's SPIFFE identity",
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"cweId": "CWE-290",
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"description": "CWE-290 Authentication Bypass by Spoofing",
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"type": "CWE"
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}
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]
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}
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],
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"impacts": [
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{
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"descriptions": [
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{
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"lang": "en",
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"value": "Workload identity spoofing"
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}
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]
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}
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],
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"affected": [
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{
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"vendor": "Kong Inc.",
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"product": "Kong Mesh",
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"platforms": [
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"Linux"
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],
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"modules": [
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"kuma-cp"
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],
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"versions": [
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{
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"status": "affected",
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"version": "2.13.0",
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"lessThan": "2.13.10",
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"versionType": "semver"
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},
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{
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"status": "affected",
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"version": "2.14.0",
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"lessThan": "2.14.2",
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"versionType": "semver"
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}
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],
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"defaultStatus": "unaffected"
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}
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],
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"descriptions": [
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{
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"lang": "en",
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"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.",
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"supportingMedia": [
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{
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"type": "text/html",
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"base64": false,
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"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>"
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}
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]
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}
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],
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"references": [
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{
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"url": "https://github.com/kumahq/kuma/security/advisories/GHSA-744g-c785-x65q",
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"name": "Upstream advisory GHSA-744g-c785-x65q",
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"tags": [
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"vendor-advisory"
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]
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},
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{
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"url": "https://github.com/kumahq/kuma/pull/17474",
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"name": "kumahq/kuma#17474 (master)",
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"tags": [
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"patch"
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]
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},
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{
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"url": "https://github.com/kumahq/kuma/pull/17503",
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"name": "kumahq/kuma#17503 (release-2.13 backport)",
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"tags": [
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"patch"
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]
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},
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{
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"url": "https://github.com/kumahq/kuma/pull/17502",
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"name": "kumahq/kuma#17502 (release-2.14 backport)",
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"tags": [
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"patch"
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]
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},
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{
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"url": "https://developer.konghq.com/mesh/changelog/",
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"name": "Kong MESH Changelog",
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"tags": [
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"release-notes"
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]
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}
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],
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"metrics": [
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{
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"format": "CVSS",
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"scenarios": [
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{
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"lang": "en",
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"value": "GENERAL"
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}
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],
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"cvssV4_0": {
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"attackVector": "NETWORK",
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"attackComplexity": "LOW",
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"attackRequirements": "PRESENT",
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"privilegesRequired": "LOW",
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"userInteraction": "NONE",
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"vulnConfidentialityImpact": "HIGH",
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"subConfidentialityImpact": "NONE",
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"vulnIntegrityImpact": "LOW",
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"subIntegrityImpact": "NONE",
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"vulnAvailabilityImpact": "NONE",
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"subAvailabilityImpact": "NONE",
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"exploitMaturity": "NOT_DEFINED",
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"Safety": "NOT_DEFINED",
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"Automatable": "NOT_DEFINED",
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"Recovery": "NOT_DEFINED",
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"valueDensity": "NOT_DEFINED",
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"vulnerabilityResponseEffort": "NOT_DEFINED",
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"providerUrgency": "NOT_DEFINED",
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"version": "4.0",
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"baseSeverity": "MEDIUM",
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"baseScore": 6,
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"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"
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}
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}
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],
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"configurations": [
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{
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"lang": "en",
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"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.",
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"supportingMedia": [
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{
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"type": "text/html",
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"base64": false,
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"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>"
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}
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]
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}
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],
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"workarounds": [
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{
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"lang": "en",
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"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.",
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"supportingMedia": [
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{
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"type": "text/html",
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"base64": false,
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"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>"
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}
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]
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}
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],
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"solutions": [
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{
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"lang": "en",
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"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.",
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"supportingMedia": [
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{
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"type": "text/html",
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"base64": false,
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"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>"
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}
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]
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}
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],
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"timeline": [
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{
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"time": "2026-08-01T16:58:00.000Z",
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"lang": "en",
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"value": "Kong Mesh 2.13.10 and 2.14.2 published"
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}
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],
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"credits": [
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{
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"lang": "en",
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"value": "kanywst",
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"type": "finder"
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}
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],
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"source": {
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"discovery": "EXTERNAL"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-08-13T14:49:14.103209Z",
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"id": "CVE-2026-18677",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-08-13T14:49:27.614Z"
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}
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}
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]
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}
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} |