FKIE_CVE-2026-18674
Vulnerability from fkie_nvd - Published: 2026-08-17 13:16 - Updated: 2026-08-17 15:16
Severity
Summary
On a Kong Mesh global control plane, resources received over the zone-to-global KDS sync are attributed using the in-band, sender-controlled ControlPlane.Identifier rather than the authenticated zone identity derived from the connection. Authenticated zones can have the global control plane store and re-distribute those resources as belonging to another zone.
The result is a cross-zone isolation bypass: the holder of a single enrolled zone's credential can inject, attribute, and overwrite resources in another zone's namespace mesh-wide.
The root cause lives in Kuma's open-source KDS sync code, which Kong Mesh's control plane is built on.
References
Impacted products
| Vendor | Product | Version |
|---|
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"modules": [
"kuma-cp"
],
"platforms": [
"Linux"
],
"product": "Kong Mesh",
"vendor": "Kong Inc.",
"versions": [
{
"lessThan": "2.7.29",
"status": "affected",
"version": "0",
"versionType": "semver"
},
{
"lessThan": "2.9.19",
"status": "affected",
"version": "2.8.0",
"versionType": "semver"
},
{
"lessThan": "2.11.18",
"status": "affected",
"version": "2.10.0",
"versionType": "semver"
},
{
"lessThan": "2.12.14",
"status": "affected",
"version": "2.12.0",
"versionType": "semver"
},
{
"lessThan": "2.13.10",
"status": "affected",
"version": "2.13.0",
"versionType": "semver"
},
{
"lessThan": "2.14.2",
"status": "affected",
"version": "2.14.0",
"versionType": "semver"
}
]
}
],
"source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "On a Kong Mesh global control plane, resources received over the zone-to-global KDS sync are attributed using the in-band, sender-controlled ControlPlane.Identifier rather than the authenticated zone identity derived from the connection. Authenticated zones can have the\u00a0global control plane store and re-distribute those resources as belonging to another zone.\n\n\n\nThe result is a cross-zone isolation bypass: the holder of a single enrolled zone\u0027s credential can inject, attribute, and overwrite resources in another zone\u0027s namespace mesh-wide.\n\n\n\n\nThe root cause lives in Kuma\u0027s open-source KDS sync code, which Kong Mesh\u0027s control plane is built on."
}
],
"id": "CVE-2026-18674",
"lastModified": "2026-08-17T15:16:54.670",
"metrics": {
"cvssMetricV40": [
{
"cvssData": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"availabilityRequirement": "NOT_DEFINED",
"baseScore": 7.0,
"baseSeverity": "HIGH",
"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": "HIGH",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "LOW",
"subIntegrityImpact": "LOW",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:H/VA:N/SC:L/SI:L/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",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "LOW",
"vulnIntegrityImpact": "HIGH",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-18674",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-17T14:46:37.265087Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-08-17T13:16:51.820",
"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/17456"
},
{
"source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb",
"url": "https://github.com/kumahq/kuma/pull/17458"
},
{
"source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb",
"url": "https://github.com/kumahq/kuma/pull/17459"
},
{
"source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb",
"url": "https://github.com/kumahq/kuma/pull/17460"
},
{
"source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb",
"url": "https://github.com/kumahq/kuma/pull/17461"
},
{
"source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb",
"url": "https://github.com/kumahq/kuma/pull/17462"
},
{
"source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb",
"url": "https://github.com/kumahq/kuma/pull/17463"
},
{
"source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb",
"url": "https://github.com/kumahq/kuma/security/advisories/GHSA-m58j-fjmc-h3g4"
}
],
"sourceIdentifier": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb",
"vulnStatus": "Received",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-345"
},
{
"lang": "en",
"value": "CWE-863"
}
],
"source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb",
"type": "Secondary"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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