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 CNA under the mitre root

CNA scorecard B 82/100 over 27 records in the last 180 days details

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

To clipboard

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                {
                  "lang": "en",
                  "value": "Workload identity spoofing"
                }
              ]
            }
          ],
          "metrics": [
            {
              "cvssV4_0": {
                "Automatable": "NOT_DEFINED",
                "Recovery": "NOT_DEFINED",
                "Safety": "NOT_DEFINED",
                "attackComplexity": "LOW",
                "attackRequirements": "PRESENT",
                "attackVector": "NETWORK",
                "baseScore": 6,
                "baseSeverity": "MEDIUM",
                "exploitMaturity": "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",
                "version": "4.0",
                "vulnAvailabilityImpact": "NONE",
                "vulnConfidentialityImpact": "HIGH",
                "vulnIntegrityImpact": "LOW",
                "vulnerabilityResponseEffort": "NOT_DEFINED"
              },
              "format": "CVSS",
              "scenarios": [
                {
                  "lang": "en",
                  "value": "GENERAL"
                }
              ]
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-290",
                  "description": "CWE-290 Authentication Bypass by Spoofing",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-12T18:47:06.710Z",
            "orgId": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb",
            "shortName": "Kong"
          },
          "references": [
            {
              "name": "Upstream advisory GHSA-744g-c785-x65q",
              "tags": [
                "vendor-advisory"
              ],
              "url": "https://github.com/kumahq/kuma/security/advisories/GHSA-744g-c785-x65q"
            },
            {
              "name": "kumahq/kuma#17474 (master)",
              "tags": [
                "patch"
              ],
              "url": "https://github.com/kumahq/kuma/pull/17474"
            },
            {
              "name": "kumahq/kuma#17503 (release-2.13 backport)",
              "tags": [
                "patch"
              ],
              "url": "https://github.com/kumahq/kuma/pull/17503"
            },
            {
              "name": "kumahq/kuma#17502 (release-2.14 backport)",
              "tags": [
                "patch"
              ],
              "url": "https://github.com/kumahq/kuma/pull/17502"
            },
            {
              "name": "Kong MESH Changelog",
              "tags": [
                "release-notes"
              ],
              "url": "https://developer.konghq.com/mesh/changelog/"
            }
          ],
          "solutions": [
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "\u003cp\u003eUpgrade 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 \u003ccode\u003ekuma.io/workload\u003c/code\u003e 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.\u003c/p\u003e"
                }
              ],
              "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."
            }
          ],
          "source": {
            "discovery": "EXTERNAL"
          },
          "timeline": [
            {
              "lang": "en",
              "time": "2026-08-01T16:58:00.000Z",
              "value": "Kong Mesh 2.13.10 and 2.14.2 published"
            }
          ],
          "title": "Kong Mesh: a dataplane token without a workload binding can claim any workload\u0027s SPIFFE identity",
          "workarounds": [
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "\u003cp\u003eIssue workload-bound dataplane tokens for every dataplane whose identity derives from the \u003ccode\u003ekuma.io/workload\u003c/code\u003e label. A workload-bound token constrains that label to the bound value, so a mismatched label is rejected at authentication.\u003c/p\u003e"
                }
              ],
              "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."
            }
          ]
        }
      },
      "cveMetadata": {
        "assignerOrgId": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb",
        "assignerShortName": "Kong",
        "cveId": "CVE-2026-18677",
        "datePublished": "2026-08-12T18:47:06.710Z",
        "dateReserved": "2026-08-03T15:20:45.630Z",
        "dateUpdated": "2026-08-13T14:49:27.614Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

FKIE_CVE-2026-18677

Vulnerability from fkie_nvd - Published: 2026-08-12 19:17 - Updated: 2026-10-23 19:10

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."
    },
    {
      "lang": "es",
      "value": "En Kong Mesh ejecut\u00e1ndose en modo universal con una MeshIdentity cuyo patr\u00f3n de ruta de ID SPIFFE deriva de la etiqueta kuma.io/workload del dataplane, el autenticador XDS en kuma-cp valida esa etiqueta solo cuyo el token del dataplane est\u00e1 vinculado a una carga de trabajo. La vinculaci\u00f3n de la carga de trabajo es opcional, por lo que un dataplane que presenta un token vinculado a etiquetas puede registrarse con kuma.io/workload establecido en cualquier valor y obtener la identidad SPIFFE de otra carga de trabajo."
    }
  ],
  "id": "CVE-2026-18677",
  "lastModified": "2026-10-23T19:10:00.167",
  "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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

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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.
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

Vulnerability timeline

Related by attack behaviour