Vulnerability-Lookup

CVE-2026-18677 (GCVE-0-2026-18677)

Vulnerability from cvelistv5 – Published: 2026-08-12 18:47 – Updated: 2026-08-13 14:49

Title

Kong Mesh: a dataplane token without a workload binding can claim any workload's SPIFFE identity

Summary

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.

Severity

6 (Medium)


                        
                          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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-13 14:49 UTC

CWE

CWE-290 - Authentication Bypass by Spoofing

Assigner

Kong mitre root

References

5 references

URL	Tags
https://github.com/kumahq/kuma/security/advisorie…	vendor-advisory
https://github.com/kumahq/kuma/pull/17474	patch
https://github.com/kumahq/kuma/pull/17503	patch
https://github.com/kumahq/kuma/pull/17502	patch
https://developer.konghq.com/mesh/changelog/	release-notes

Impacted products

1 product

Vendor	Product	Version	CPE status
Kong Inc.	Kong Mesh	Affected: 2.13.0 , < 2.13.10 (semver) Affected: 2.14.0 , < 2.14.2 (semver)	guessed

Credits

kanywst

Show details on NVD website

JSON

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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\u0027s SPIFFE identity.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eIn Kong Mesh running in universal mode with a \u003ccode\u003eMeshIdentity\u003c/code\u003e whose SPIFFE ID path template derives from the dataplane\u0027s \u003ccode\u003ekuma.io/workload\u003c/code\u003e label, the XDS authenticator in \u003ccode\u003ekuma-cp\u003c/code\u003e 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 \u003ccode\u003ekuma.io/workload\u003c/code\u003e set to any value and obtain another workload\u0027s SPIFFE identity.\u003c/p\u003e\", \"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\u0027s 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\": \"\u003cp\u003eYou are affected if all of the following hold:\u003c/p\u003e\u003cul\u003e\u003cli\u003eThe control plane runs in universal mode.\u003c/li\u003e\u003cli\u003eA \u003ccode\u003eMeshIdentity\u003c/code\u003e is configured whose SPIFFE ID path template derives from the workload label, including the default universal template \u003ccode\u003e/workload/{{ .Workload }}\u003c/code\u003e.\u003c/li\u003e\u003cli\u003eDataplanes authenticate with tokens that are not bound to a workload (tags-bound tokens, the common case, since workload binding is newer and optional).\u003c/li\u003e\u003c/ul\u003e\u003cp\u003eYou are not affected if:\u003c/p\u003e\u003cul\u003e\u003cli\u003eThe control plane runs in Kubernetes mode. Its identity template is \u003ccode\u003e/ns/{{ .Namespace }}/sa/{{ .ServiceAccount }}\u003c/code\u003e, and the control plane derives those values from the pod\u0027s real identity rather than from a label the workload sets.\u003c/li\u003e\u003cli\u003eYour \u003ccode\u003eMeshIdentity\u003c/code\u003e uses a SPIFFE template that does not reference the workload label.\u003c/li\u003e\u003cli\u003eEvery dataplane whose identity derives from the workload label already uses a workload-bound token.\u003c/li\u003e\u003c/ul\u003e\", \"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\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

FKIE_CVE-2026-18677

Vulnerability from fkie_nvd - Published: 2026-08-12 19:17 - Updated: 2026-08-31 19:22

Severity

6.0 (Medium) - 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

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/17474
	02762ae7-200e-4b20-9b2b-a77d5b8fc4cb	https://github.com/kumahq/kuma/pull/17502
	02762ae7-200e-4b20-9b2b-a77d5b8fc4cb	https://github.com/kumahq/kuma/pull/17503
	02762ae7-200e-4b20-9b2b-a77d5b8fc4cb	https://github.com/kumahq/kuma/security/advisories/GHSA-744g-c785-x65q

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": "2.13.10",
              "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": "In Kong Mesh running in universal mode with a MeshIdentity whose SPIFFE ID path template derives from the dataplane\u0027s 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\u0027s SPIFFE identity."
    }
  ],
  "id": "CVE-2026-18677",
  "lastModified": "2026-08-31T19:22:43.473",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "PRESENT",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 6.0,
          "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": "LOW",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "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/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": "HIGH",
          "vulnIntegrityImpact": "LOW",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-18677",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-13T14:49:14.103209Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-12T19:17:31.063",
  "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/17474"
    },
    {
      "source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb",
      "url": "https://github.com/kumahq/kuma/pull/17502"
    },
    {
      "source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb",
      "url": "https://github.com/kumahq/kuma/pull/17503"
    },
    {
      "source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb",
      "url": "https://github.com/kumahq/kuma/security/advisories/GHSA-744g-c785-x65q"
    }
  ],
  "sourceIdentifier": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-290"
        }
      ],
      "source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb",
      "type": "Secondary"
    }
  ]
}

GHSA-6P7W-XXW9-J47F

Vulnerability from github – Published: 2026-08-12 21:31 – Updated: 2026-08-12 21:31

Details

Severity

6.0 (Medium)


                  
                    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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-18677"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-290"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-12T19:17:31Z",
    "severity": "MODERATE"
  },
  "details": "In Kong Mesh running in universal mode with a MeshIdentity whose SPIFFE ID path template derives from the dataplane\u0027s 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\u0027s SPIFFE identity.",
  "id": "GHSA-6p7w-xxw9-j47f",
  "modified": "2026-08-12T21:31:39Z",
  "published": "2026-08-12T21:31:39Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/kumahq/kuma/security/advisories/GHSA-744g-c785-x65q"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-18677"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kumahq/kuma/pull/17474"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kumahq/kuma/pull/17502"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kumahq/kuma/pull/17503"
    },
    {
      "type": "WEB",
      "url": "https://developer.konghq.com/mesh/changelog"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "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/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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-18677 (GCVE-0-2026-18677)

FKIE_CVE-2026-18677

GHSA-6P7W-XXW9-J47F

Tags

Sightings

Nomenclature

Related by attack behaviour