Vulnerability-Lookup

CVE-2026-18679 (GCVE-0-2026-18679)

Vulnerability from cvelistv5 – Published: 2026-08-12 18:52 – Updated: 2026-08-13 14:45

Title

Kong Mesh: kuma-dp connects to the control plane without verifying the TLS certificate when no CA is configured

Summary

When kuma-dp is started against an HTTPS control plane and the operator did not pass a CA certificate, the data plane connects with TLS peer verification disabled, and the dataplane authentication token is sent over that unverified connection. An on-path actor can intercept the dataplane authentication token and impersonate the control plane to the data plane, injecting a forged bootstrap configuration and taking over the proxy.

Severity

5.8 (Medium)


                        
                          CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-13 14:45 UTC

CWE

CWE-295 - Improper Certificate Validation

Assigner

Kong CNA under the mitre root

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

References

3 references

URL	Tags
https://github.com/kumahq/kuma/security/advisorie…	vendor-advisory
https://github.com/kumahq/kuma/pull/16777	patch
https://developer.konghq.com/mesh/changelog/	release-notes

Impacted products

1 product

Vendor	Product	Version	CPE status
Kong Inc.	Kong Mesh	Affected: 0 , < 2.7.26 (semver) Affected: 2.8.0 , < 2.9.16 (semver) Affected: 2.10.0 , < 2.11.14 (semver) Affected: 2.12.0 , < 2.12.11 (semver) Affected: 2.13.0 , < 2.13.7 (semver)	guessed

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            {
              "descriptions": [
                {
                  "cweId": "CWE-295",
                  "description": "CWE-295 Improper Certificate Validation",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-12T18:52:31.146Z",
            "orgId": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb",
            "shortName": "Kong"
          },
          "references": [
            {
              "name": "Upstream advisory GHSA-wvmp-6r4v-j6cv",
              "tags": [
                "vendor-advisory"
              ],
              "url": "https://github.com/kumahq/kuma/security/advisories/GHSA-wvmp-6r4v-j6cv"
            },
            {
              "name": "kumahq/kuma#16777 (master)",
              "tags": [
                "patch"
              ],
              "url": "https://github.com/kumahq/kuma/pull/16777"
            },
            {
              "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 2.7.26, 2.9.16, 2.11.14, 2.12.11 or 2.13.7, whichever matches your release line. Patched releases fall back to the operating system trust store instead of disabling verification, so a publicly trusted control plane certificate verifies with no further configuration. The 2.14 line shipped after the fix and was never affected.\u003c/p\u003e"
                }
              ],
              "value": "Upgrade to Kong Mesh 2.7.26, 2.9.16, 2.11.14, 2.12.11 or 2.13.7, whichever matches your release line. Patched releases fall back to the operating system trust store instead of disabling verification, so a publicly trusted control plane certificate verifies with no further configuration. The 2.14 line shipped after the fix and was never affected."
            }
          ],
          "source": {
            "discovery": "INTERNAL"
          },
          "timeline": [
            {
              "lang": "en",
              "time": "2026-06-03T20:20:00.000Z",
              "value": "Kong Mesh patched releases published"
            },
            {
              "lang": "en",
              "time": "2026-07-16T16:42:00.000Z",
              "value": "Upstream advisory GHSA-wvmp-6r4v-j6cv published"
            }
          ],
          "title": "Kong Mesh: kuma-dp connects to the control plane without verifying the TLS certificate when no CA is configured",
          "workarounds": [
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "\u003cp\u003eSet \u003ccode\u003e--ca-cert-file\u003c/code\u003e, or \u003ccode\u003eKUMA_CONTROL_PLANE_CA_CERT\u003c/code\u003e, on every universal mode data plane and point it at the control plane\u0027s serving CA. Alternatively terminate the control plane behind a publicly trusted certificate.\u003c/p\u003e"
                }
              ],
              "value": "Set --ca-cert-file, or KUMA_CONTROL_PLANE_CA_CERT, on every universal mode data plane and point it at the control plane\u0027s serving CA. Alternatively terminate the control plane behind a publicly trusted certificate."
            }
          ]
        }
      },
      "cveMetadata": {
        "assignerOrgId": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb",
        "assignerShortName": "Kong",
        "cveId": "CVE-2026-18679",
        "datePublished": "2026-08-12T18:52:31.146Z",
        "dateReserved": "2026-08-03T15:20:48.055Z",
        "dateUpdated": "2026-08-13T14:45:35.957Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

FKIE_CVE-2026-18679

Vulnerability from fkie_nvd - Published: 2026-08-12 20:17 - Updated: 2026-10-23 19:10

Severity

5.8 (Medium) - CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H

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/16777
	02762ae7-200e-4b20-9b2b-a77d5b8fc4cb	https://github.com/kumahq/kuma/security/advisories/GHSA-wvmp-6r4v-j6cv

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "modules": [
            "kuma-dp"
          ],
          "platforms": [
            "Linux"
          ],
          "product": "Kong Mesh",
          "vendor": "Kong Inc.",
          "versions": [
            {
              "lessThan": "2.7.26",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "2.9.16",
              "status": "affected",
              "version": "2.8.0",
              "versionType": "semver"
            },
            {
              "lessThan": "2.11.14",
              "status": "affected",
              "version": "2.10.0",
              "versionType": "semver"
            },
            {
              "lessThan": "2.12.11",
              "status": "affected",
              "version": "2.12.0",
              "versionType": "semver"
            },
            {
              "lessThan": "2.13.7",
              "status": "affected",
              "version": "2.13.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "When kuma-dp is started against an HTTPS control plane and the operator did not pass a CA certificate, the data plane connects with TLS peer verification disabled, and the dataplane authentication token is sent over that unverified connection.\n\n\n\nAn on-path actor can intercept the dataplane authentication token and impersonate the control plane to the data plane, injecting a forged bootstrap configuration and taking over the proxy."
    },
    {
      "lang": "es",
      "value": "Cuyo kuma-dp se inicia contra un plano de control HTTPS y el operador no pas\u00f3 un certificado CA, el plano de datos se conecta con la verificaci\u00f3n de pares TLS deshabilitada, y el token de autenticaci\u00f3n del plano de datos se env\u00eda a trav\u00e9s de esa conexi\u00f3n no verificada.\n\nUn actor en la ruta puede interceptar el token de autenticaci\u00f3n del plano de datos y suplantar al plano de control ante el plano de datos, inyectyo una configuraci\u00f3n de arranque falsificada y tomyo el control del proxy."
    }
  ],
  "id": "CVE-2026-18679",
  "lastModified": "2026-10-23T19:10:00.167",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "HIGH",
          "attackRequirements": "PRESENT",
          "attackVector": "ADJACENT",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 5.8,
          "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": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "HIGH",
          "subConfidentialityImpact": "HIGH",
          "subIntegrityImpact": "HIGH",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/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": "NONE",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-18679",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-13T14:45:22.142897Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-12T20:17:41.957",
  "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/16777"
    },
    {
      "source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb",
      "url": "https://github.com/kumahq/kuma/security/advisories/GHSA-wvmp-6r4v-j6cv"
    }
  ],
  "sourceIdentifier": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-295"
        }
      ],
      "source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb",
      "type": "Secondary"
    }
  ]
}

GHSA-WC82-HQX6-G35Q

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

Details

An on-path actor can intercept the dataplane authentication token and impersonate the control plane to the data plane, injecting a forged bootstrap configuration and taking over the proxy.

Severity

5.8 (Medium)


                  
                    CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-18679"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-295"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-12T20:17:41Z",
    "severity": "MODERATE"
  },
  "details": "When kuma-dp is started against an HTTPS control plane and the operator did not pass a CA certificate, the data plane connects with TLS peer verification disabled, and the dataplane authentication token is sent over that unverified connection.\n\n\n\nAn on-path actor can intercept the dataplane authentication token and impersonate the control plane to the data plane, injecting a forged bootstrap configuration and taking over the proxy.",
  "id": "GHSA-wc82-hqx6-g35q",
  "modified": "2026-08-12T21:31:40Z",
  "published": "2026-08-12T21:31:40Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/kumahq/kuma/security/advisories/GHSA-wvmp-6r4v-j6cv"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-18679"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kumahq/kuma/pull/16777"
    },
    {
      "type": "WEB",
      "url": "https://developer.konghq.com/mesh/changelog"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/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-2026-18679 (GCVE-0-2026-18679)

FKIE_CVE-2026-18679

GHSA-WC82-HQX6-G35Q

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour