CVE-2026-13491

{
  "id": "CVE-2026-13491",
  "sourceIdentifier": "[email protected]",
  "published": "2026-06-28T12:17:03.513",
  "lastModified": "2026-10-25T17:10:00.197",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability was detected in 78 xiaozhi-esp32 up to 2.2.6. This vulnerability affects the function Application::GetInstance of the file main/protocols/mqtt_protocol.cc of the component MQTT Goodbye Handler. Performing a manipulation of the argument session_id results in denial of service. The attack is possible to be carried out remotely. The complexity of an attack is rather high. It is stated that the exploitability is difficult. The exploit is now public and may be used. The patch is named e182471f8c5a22434346bd98da34d3b66c8c8b3e. It is recommended to apply a patch to fix this issue."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad fue detectada en 78 xiaozhi-esp32 hasta 2.2.6. Esta vulnerabilidad afecta la función Application::GetInstance del archivo main/protocols/mqtt_protocol.cc del componente MQTT Goodbye Gestor. Realizar una manipulación del argumento session_id resulta en denegación de servicio. El ataque es posible de ser llevado a cabo remotamente. La complejidad de un ataque es bastante alta. Se afirma que la explotabilidad es difícil. El exploit es ahora público y puede ser usado. El parche se llama e182471f8c5a22434346bd98da34d3b66c8c8b3e. Se recomienda aplicar un parche para solucionar este problema."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "78",
          "product": "xiaozhi-esp32",
          "cpes": [
            "cpe:2.3:a:78:xiaozhi-esp32:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "MQTT Goodbye Handler"
          ],
          "versions": [
            {
              "version": "2.2.0",
              "status": "affected"
            },
            {
              "version": "2.2.1",
              "status": "affected"
            },
            {
              "version": "2.2.2",
              "status": "affected"
            },
            {
              "version": "2.2.3",
              "status": "affected"
            },
            {
              "version": "2.2.4",
              "status": "affected"
            },
            {
              "version": "2.2.5",
              "status": "affected"
            },
            {
              "version": "2.2.6",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV40": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "4.0",
          "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/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",
          "baseScore": 2.9,
          "baseSeverity": "LOW",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "attackRequirements": "NONE",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "vulnAvailabilityImpact": "LOW",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "subAvailabilityImpact": "NONE",
          "exploitMaturity": "PROOF_OF_CONCEPT",
          "confidentialityRequirement": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "valueDensity": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L",
          "baseScore": 3.7,
          "baseSeverity": "LOW",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "LOW"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 1.4
      }
    ],
    "cvssMetricV2": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "2.0",
          "vectorString": "AV:N/AC:H/Au:N/C:N/I:N/A:P",
          "baseScore": 2.6,
          "accessVector": "NETWORK",
          "accessComplexity": "HIGH",
          "authentication": "NONE",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "PARTIAL"
        },
        "baseSeverity": "LOW",
        "exploitabilityScore": 4.9,
        "impactScore": 2.9,
        "acInsufInfo": false,
        "obtainAllPrivilege": false,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-06-29T12:28:44.324743Z",
          "id": "CVE-2026-13491",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-404"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/78/xiaozhi-esp32/",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/78/xiaozhi-esp32/commit/e182471f8c5a22434346bd98da34d3b66c8c8b3e",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/78/xiaozhi-esp32/issues/2022",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/78/xiaozhi-esp32/pull/2023",
      "source": "[email protected]"
    },
    {
      "url": "https://vuldb.com/cve/CVE-2026-13491",
      "source": "[email protected]"
    },
    {
      "url": "https://vuldb.com/submit/838439",
      "source": "[email protected]"
    },
    {
      "url": "https://vuldb.com/vuln/374488",
      "source": "[email protected]"
    },
    {
      "url": "https://vuldb.com/vuln/374488/cti",
      "source": "[email protected]"
    }
  ]
}