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CVE-2026-44640

Status: DeferredMedium (4.5)—

NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. Prior to 0.24.14, aio->prov_data is stored as nni_quic_conn* during dialing, but read as ex_quic_conn* during dialer close. This type confusion causes invalid object interpretation and leads to close-path hang/crash behavior. This vulnerability is fixed in 0.24.14.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Emqx — NanomqAI

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2026-44640",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-44640",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-05-29T21:35:30.437638Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 4.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "HIGH",
          "availabilityImpact": "LOW",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 3.4,
        "exploitabilityScore": 1
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "nanomq",
          "product": "nanomq",
          "versions": [
            {
              "status": "affected",
              "version": "< 0.24.14"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-05-29T20:16:24.983",
  "references": [
    {
      "url": "https://github.com/nanomq/nanomq/releases/tag/0.24.14",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/nanomq/nanomq/security/advisories/GHSA-9fgw-v323-jmjj",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/nanomq/nanomq/security/advisories/GHSA-9fgw-v323-jmjj",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-843"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. Prior to 0.24.14, aio->prov_data is stored as nni_quic_conn* during dialing, but read as ex_quic_conn* during dialer close. This type confusion causes invalid object interpretation and leads to close-path hang/crash behavior. This vulnerability is fixed in 0.24.14."
    },
    {
      "lang": "es",
      "value": "NanoMQ MQTT Broker (NanoMQ) es una Plataforma de Mensajería de Borde integral. Antes de la 0.24.14, aio->prov_data se almacena como nni_quic_conn* durante la marcación, pero se lee como ex_quic_conn* durante el cierre del marcador. Esta confusión de tipos causa una interpretación de objeto no válida y conduce a un comportamiento de cuelgue/fallo en la ruta de cierre. Esta vulnerabilidad está corregida en la 0.24.14."
    }
  ],
  "lastModified": "2026-07-22T06:10:00.170",
  "sourceIdentifier": "security-advisories@github.com"
}