{"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"}}]}}