{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-61633",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-07-10T17:38:57.111Z",
        "datePublished": "2026-09-18T16:18:57.029Z",
        "dateUpdated": "2026-09-18T17:26:49.956Z"
    },
    "containers": {
        "cna": {
            "title": "NanoMQ: Infinite Loop in UNSUBSCRIBE Decoder Leading to Remote DoS",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-835",
                            "lang": "en",
                            "description": "CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "HIGH",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "LOW",
                        "baseScore": 2,
                        "baseSeverity": "LOW",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "NONE",
                        "privilegesRequired": "HIGH",
                        "scope": "UNCHANGED",
                        "userInteraction": "REQUIRED",
                        "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:L",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/nanomq/nanomq/security/advisories/GHSA-m7mp-rr3v-hmhr",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/nanomq/nanomq/security/advisories/GHSA-m7mp-rr3v-hmhr"
                },
                {
                    "name": "https://github.com/nanomq/NanoNNG/pull/1518",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/nanomq/NanoNNG/pull/1518"
                },
                {
                    "name": "https://github.com/nanomq/NanoNNG/commit/fa8d859bb39841e46cfc6cce280d242bd782ad3d",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/nanomq/NanoNNG/commit/fa8d859bb39841e46cfc6cce280d242bd782ad3d"
                },
                {
                    "name": "https://github.com/nanomq/nanomq/releases/tag/0.24.14",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/nanomq/nanomq/releases/tag/0.24.14"
                }
            ],
            "affected": [
                {
                    "vendor": "nanomq",
                    "product": "nanomq",
                    "versions": [
                        {
                            "version": "< 0.24.14",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-09-18T16:18:57.029Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "NanoMQ is an MQTT broker. Prior to 0.24.14, the NanoMQ client function nni_mqtt_msg_decode_unsubscribe() in nng/src/supplemental/mqtt/mqtt_codec.c does not handle a failed read_uint16() while counting topics in a malformed UNSUBSCRIBE packet. A zero-length topic followed by trailing data can leave buf.curpos unchanged while topic_count continues to increase, allowing a malicious MQTT broker to hang a connecting MQTT 3.1.1 client, consume CPU and memory, and repeatedly deny service when automatic reconnection is enabled. The broker-side nmq_unsubinfo_decode path is not affected. This issue is fixed in version 0.24.14."
                }
            ],
            "source": {
                "advisory": "GHSA-m7mp-rr3v-hmhr",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/nanomq/nanomq/security/advisories/GHSA-m7mp-rr3v-hmhr",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-09-18T17:26:25.126842Z",
                                "id": "CVE-2026-61633",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-09-18T17:26:49.956Z"
                }
            }
        ]
    }
}