{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-21888", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-01-05T17:24:36.929Z", "datePublished": "2026-03-11T15:22:32.463Z", "dateUpdated": "2026-03-11T15:35:36.678Z"}, "containers": {"cna": {"title": "MQTT v5 Variable Byte Integer parsing out-of-bounds: get_var_integer()", "problemTypes": [{"descriptions": [{"cweId": "CWE-125", "lang": "en", "description": "CWE-125: Out-of-bounds Read", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/nanomq/nanomq/security/advisories/GHSA-cggc-6m7w-j7x5", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/nanomq/nanomq/security/advisories/GHSA-cggc-6m7w-j7x5"}, {"name": "https://github.com/nanomq/nanomq/issues/2192", "tags": ["x_refsource_MISC"], "url": "https://github.com/nanomq/nanomq/issues/2192"}], "affected": [{"vendor": "nanomq", "product": "nanomq", "versions": [{"version": "<= 0.24.6", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-03-11T15:22:32.463Z"}, "descriptions": [{"lang": "en", "value": "NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. MQTT v5 Variable Byte Integer parsing out-of-bounds: get_var_integer() accepts 5-byte varints without bounds checks; reliably triggers OOB read / crash when built with ASan. This affects 0.24.6 and earlier."}], "source": {"advisory": "GHSA-cggc-6m7w-j7x5", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-03-11T15:35:24.683645Z", "id": "CVE-2026-21888", "options": [{"Exploitation": "poc"}, {"Automatable": "yes"}, {"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": "2026-03-11T15:35:36.678Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-21888", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-03-11T15:35:24.683645Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-03-11T15:35:27.865Z"}}], "cna": {"title": "MQTT v5 Variable Byte Integer parsing out-of-bounds: get_var_integer()", "source": {"advisory": "GHSA-cggc-6m7w-j7x5", "discovery": "UNKNOWN"}, "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}], "affected": [{"vendor": "nanomq", "product": "nanomq", "versions": [{"status": "affected", "version": "<= 0.24.6"}]}], "references": [{"url": "https://github.com/nanomq/nanomq/security/advisories/GHSA-cggc-6m7w-j7x5", "name": "https://github.com/nanomq/nanomq/security/advisories/GHSA-cggc-6m7w-j7x5", "tags": ["x_refsource_CONFIRM"]}, {"url": "https://github.com/nanomq/nanomq/issues/2192", "name": "https://github.com/nanomq/nanomq/issues/2192", "tags": ["x_refsource_MISC"]}], "descriptions": [{"lang": "en", "value": "NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. MQTT v5 Variable Byte Integer parsing out-of-bounds: get_var_integer() accepts 5-byte varints without bounds checks; reliably triggers OOB read / crash when built with ASan. This affects 0.24.6 and earlier."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-125", "description": "CWE-125: Out-of-bounds Read"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-03-11T15:22:32.463Z"}}}, "cveMetadata": {"cveId": "CVE-2026-21888", "state": "PUBLISHED", "dateUpdated": "2026-03-11T15:35:36.678Z", "dateReserved": "2026-01-05T17:24:36.929Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-03-11T15:22:32.463Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. MQTT v5 Variable Byte Integer parsing out-of-bounds: get_var_integer() accepts 5-byte varints without bounds checks; reliably triggers OOB read / crash when built with ASan. This affects 0.24.6 and earlier."}], "id": "CVE-2026-21888", "lastModified": "2026-03-11T16:16:23.930", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-03-11T16:16:23.930", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/nanomq/nanomq/issues/2192"}, {"source": "security-advisories@github.com", "url": "https://github.com/nanomq/nanomq/security/advisories/GHSA-cggc-6m7w-j7x5"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}