{"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"}}]}}

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