Vulnerability-Lookup

CVE-2026-18674 (GCVE-0-2026-18674)

Vulnerability from cvelistv5 – Published: 2026-08-17 12:08 – Updated: 2026-08-17 14:46

Title

Kong Mesh multi-zone: the global control plane attributes KDS-synced resources by an unvalidated in-band zone identifier

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.

Severity

7 (High)


                        
                          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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-17 14:46 UTC

CWE

CWE-345 - Insufficient Verification of Data Authenticity
CWE-863 - Incorrect Authorization

Assigner

Kong

References

9 references

URL	Tags
https://github.com/kumahq/kuma/security/advisorie…	vendor-advisory
https://github.com/kumahq/kuma/pull/17456	patch
https://github.com/kumahq/kuma/pull/17458	patch
https://github.com/kumahq/kuma/pull/17461	patch
https://github.com/kumahq/kuma/pull/17463	patch
https://github.com/kumahq/kuma/pull/17462	patch
https://github.com/kumahq/kuma/pull/17460	patch
https://github.com/kumahq/kuma/pull/17459	patch
https://developer.konghq.com/mesh/changelog/	release-notes

Impacted products

1 product

Vendor	Product	Version	CPE status
Kong Inc.	Kong Mesh	Affected: 0 , < 2.7.29 (semver) Affected: 2.8.0 , < 2.9.19 (semver) Affected: 2.10.0 , < 2.11.18 (semver) Affected: 2.12.0 , < 2.12.14 (semver) Affected: 2.13.0 , < 2.13.10 (semver) Affected: 2.14.0 , < 2.14.2 (semver)	guessed

Credits

johanw

Show details on NVD website

JSON

To clipboard

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In patched versions the global KDS ingest path attributes synced resources by the authenticated connection identity instead of the in-band field.\u003c/p\u003e\", \"base64\": false}]}], \"references\": [{\"url\": \"https://github.com/kumahq/kuma/security/advisories/GHSA-m58j-fjmc-h3g4\", \"name\": \"Upstream advisory GHSA-m58j-fjmc-h3g4\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://github.com/kumahq/kuma/pull/17456\", \"name\": \"kumahq/kuma#17456 (master)\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/kumahq/kuma/pull/17458\", \"name\": \"kumahq/kuma#17458 (release-2.14 backport)\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/kumahq/kuma/pull/17461\", \"name\": \"kumahq/kuma#17461 (release-2.13 backport)\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/kumahq/kuma/pull/17463\", \"name\": \"kumahq/kuma#17463 (release-2.12 backport)\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/kumahq/kuma/pull/17462\", \"name\": \"kumahq/kuma#17462 (release-2.11 backport)\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/kumahq/kuma/pull/17460\", \"name\": \"kumahq/kuma#17460 (release-2.9 backport)\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/kumahq/kuma/pull/17459\", \"name\": \"kumahq/kuma#17459 (release-2.7 backport)\", \"tags\": [\"patch\"]}, {\"url\": \"https://developer.konghq.com/mesh/changelog/\", \"name\": \"Kong Mesh Changelog\", \"tags\": [\"release-notes\"]}], \"workarounds\": [{\"lang\": \"en\", \"value\": \"Restrict which zones may enroll and protect zone tokens. No configuration flag disables the in-band attribution, so upgrading is the only fix.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eRestrict which zones may enroll and protect zone tokens. No configuration flag disables the in-band attribution, so upgrading is the only fix.\u003c/p\u003e\", \"base64\": false}]}], \"x_generator\": {\"engine\": \"Vulnogram 1.0.4\"}, \"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.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eOn a Kong Mesh global control plane, resources received over the zone-to-global KDS sync are attributed using the in-band, sender-controlled \u003ccode\u003eControlPlane.Identifier\u003c/code\u003e rather than the authenticated zone identity derived from the connection. Authenticated zones can have the\u0026nbsp;global control plane store and re-distribute those resources as belonging to another zone.\u003c/p\u003e\u003cp\u003eThe 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.\u003cbr\u003e\u003c/p\u003e\u003cp\u003eThe root cause lives in Kuma\u0027s open-source KDS sync code, which Kong Mesh\u0027s control plane is built on.\u003cbr\u003e\u003c/p\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-345\", \"description\": \"CWE-345 Insufficient Verification of Data Authenticity\"}]}, {\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-863\", \"description\": \"CWE-863 Incorrect Authorization\"}]}], \"configurations\": [{\"lang\": \"en\", \"value\": \"You are affected only if you run a multi-zone deployment of Kong Mesh. If a threat actor controls, or holds a valid zone token for, at least one enrolled zone they can leverage the issue.\\u00a0\\n\\n\\n\\nYou are not affected if you run a single-zone deployment.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eYou are affected only if you run a multi-zone deployment of Kong Mesh. If a threat actor controls, or holds a valid zone token for, at least one enrolled zone they can leverage the issue.\u0026nbsp;\u003c/p\u003e\u003cp\u003e\u003cspan\u003eYou are not affected if you run a single-zone deployment.\u003c/span\u003e\u003c/p\u003e\", \"base64\": false}]}], \"providerMetadata\": {\"orgId\": \"02762ae7-200e-4b20-9b2b-a77d5b8fc4cb\", \"shortName\": \"Kong\", \"dateUpdated\": \"2026-08-17T12:08:11.470Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-18674\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-17T14:46:48.378Z\", \"dateReserved\": \"2026-08-03T15:20:40.972Z\", \"assignerOrgId\": \"02762ae7-200e-4b20-9b2b-a77d5b8fc4cb\", \"datePublished\": \"2026-08-17T12:08:11.470Z\", \"assignerShortName\": \"Kong\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

FKIE_CVE-2026-18674

Vulnerability from fkie_nvd - Published: 2026-08-17 13:16 - Updated: 2026-08-17 15:16

Severity

7.0 (High) - 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

Summary

References

	URL	Tags
	02762ae7-200e-4b20-9b2b-a77d5b8fc4cb	https://developer.konghq.com/mesh/changelog/
	02762ae7-200e-4b20-9b2b-a77d5b8fc4cb	https://github.com/kumahq/kuma/pull/17456
	02762ae7-200e-4b20-9b2b-a77d5b8fc4cb	https://github.com/kumahq/kuma/pull/17458
	02762ae7-200e-4b20-9b2b-a77d5b8fc4cb	https://github.com/kumahq/kuma/pull/17459
	02762ae7-200e-4b20-9b2b-a77d5b8fc4cb	https://github.com/kumahq/kuma/pull/17460
	02762ae7-200e-4b20-9b2b-a77d5b8fc4cb	https://github.com/kumahq/kuma/pull/17461
	02762ae7-200e-4b20-9b2b-a77d5b8fc4cb	https://github.com/kumahq/kuma/pull/17462
	02762ae7-200e-4b20-9b2b-a77d5b8fc4cb	https://github.com/kumahq/kuma/pull/17463
	02762ae7-200e-4b20-9b2b-a77d5b8fc4cb	https://github.com/kumahq/kuma/security/advisories/GHSA-m58j-fjmc-h3g4

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "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"
    }
  ]
}

GHSA-FXCR-QWX6-5H7Q

Vulnerability from github – Published: 2026-08-17 15:30 – Updated: 2026-08-17 15:30

Details

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.

Severity

7.0 (High)


                  
                    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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-18674"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-345"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-17T13:16:51Z",
    "severity": "HIGH"
  },
  "details": "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": "GHSA-fxcr-qwx6-5h7q",
  "modified": "2026-08-17T15:30:38Z",
  "published": "2026-08-17T15:30:38Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/kumahq/kuma/security/advisories/GHSA-m58j-fjmc-h3g4"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-18674"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kumahq/kuma/pull/17456"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kumahq/kuma/pull/17458"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kumahq/kuma/pull/17459"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kumahq/kuma/pull/17460"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kumahq/kuma/pull/17461"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kumahq/kuma/pull/17462"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kumahq/kuma/pull/17463"
    },
    {
      "type": "WEB",
      "url": "https://developer.konghq.com/mesh/changelog"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ]
}

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.

Detection rules are retrieved from Rulezet.

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.

Action not permitted

CVE-2026-18674 (GCVE-0-2026-18674)

FKIE_CVE-2026-18674

GHSA-FXCR-QWX6-5H7Q

Tags

Sightings

Nomenclature