{"id":"CVE-2026-21888","summary":"MQTT v5 Variable Byte Integer parsing out-of-bounds: get_var_integer()","details":"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.","aliases":["GHSA-cggc-6m7w-j7x5"],"modified":"2026-04-10T05:38:36.354814Z","published":"2026-03-11T15:22:32.463Z","database_specific":{"cwe_ids":["CWE-125"],"cna_assigner":"GitHub_M","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/21xxx/CVE-2026-21888.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/21xxx/CVE-2026-21888.json"},{"type":"ADVISORY","url":"https://github.com/nanomq/nanomq/security/advisories/GHSA-cggc-6m7w-j7x5"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-21888"},{"type":"REPORT","url":"https://github.com/nanomq/nanomq/issues/2192"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/emqx/nanomq","events":[{"introduced":"0"},{"last_affected":"dc3a3136cd82d5c005b8cd26a65fe53beaaf0eb9"}],"database_specific":{"versions":[{"introduced":"0"},{"last_affected":"0.24.6"}]}}],"versions":["0.0.1","0.0.2","0.0.3","0.1.0","0.10.1","0.10.5","0.10.8","0.11.0","0.11.2","0.11.3","0.11.5","0.11.8","0.11.82","0.12.0","0.12.1","0.12.2","0.12.5","0.13.0","0.13.6","0.13.8","0.14.0","0.14.1","0.14.5","0.14.8","0.15.0","0.15.1","0.15.2","0.15.3","0.15.5","0.16.0","0.16.2","0.16.3","0.16.5","0.17.2","0.17.5","0.17.8","0.18.1","0.18.2","0.19.0","0.19.1","0.19.5","0.2.0","0.2.1","0.2.2","0.2.5","0.20.0","0.20.5","0.20.6","0.20.8","0.21","0.21.1","0.21.10","0.21.2","0.21.5","0.21.6","0.21.7","0.21.8","0.21.9","0.22.0","0.22.1","0.22.10","0.22.2","0.22.3","0.22.6","0.22.7","0.22.8","0.23.0","0.23.1","0.23.10","0.23.2","0.23.3","0.23.4","0.23.5","0.23.6","0.23.7","0.23.7-11","0.23.8","0.23.9","0.24.0","0.24.1","0.24.2","0.24.3","0.24.3-5","0.24.4","0.24.5","0.24.6","0.3.0","0.3.2","0.3.3","0.3.4","0.3.5","0.3.8","0.4.0","0.4.1","0.4.2","0.4.3","0.4.5","0.4.8","0.5.0","0.5.2","0.5.5","0.5.8","0.5.9","0.6.0","0.6.2","0.6.3","0.6.4","0.6.7rc","0.6.8","0.7.0","0.7.2","0.7.3","0.7.4","0.7.4rc","0.7.5","0.7.5rc","0.7.8","0.7.9","0.8.0","0.8.3","0.8.5","0.8.6log","0.9.0","0.9.2","0.9.5","0.9.7"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-21888.json"}},{"ranges":[{"type":"GIT","repo":"https://github.com/nanomq/nanomq","events":[{"introduced":"0"},{"last_affected":"dc3a3136cd82d5c005b8cd26a65fe53beaaf0eb9"}],"database_specific":{"versions":[{"introduced":"0"},{"last_affected":"0.24.6"}]}}],"versions":["0.0.1","0.0.2","0.0.3","0.1.0","0.10.1","0.10.5","0.10.8","0.11.0","0.11.2","0.11.3","0.11.5","0.11.8","0.11.82","0.12.0","0.12.1","0.12.2","0.12.5","0.13.0","0.13.6","0.13.8","0.14.0","0.14.1","0.14.5","0.14.8","0.15.0","0.15.1","0.15.2","0.15.3","0.15.5","0.16.0","0.16.2","0.16.3","0.16.5","0.17.2","0.17.5","0.17.8","0.18.1","0.18.2","0.19.0","0.19.1","0.19.5","0.2.0","0.2.1","0.2.2","0.2.5","0.20.0","0.20.5","0.20.6","0.20.8","0.21","0.21.1","0.21.10","0.21.2","0.21.5","0.21.6","0.21.7","0.21.8","0.21.9","0.22.0","0.22.1","0.22.10","0.22.2","0.22.3","0.22.6","0.22.7","0.22.8","0.23.0","0.23.1","0.23.10","0.23.2","0.23.3","0.23.4","0.23.5","0.23.6","0.23.7","0.23.7-11","0.23.8","0.23.9","0.24.0","0.24.1","0.24.2","0.24.3","0.24.3-5","0.24.4","0.24.5","0.24.6","0.3.0","0.3.2","0.3.3","0.3.4","0.3.5","0.3.8","0.4.0","0.4.1","0.4.2","0.4.3","0.4.5","0.4.8","0.5.0","0.5.2","0.5.5","0.5.8","0.5.9","0.6.0","0.6.2","0.6.3","0.6.4","0.6.7rc","0.6.8","0.7.0","0.7.2","0.7.3","0.7.4","0.7.4rc","0.7.5","0.7.5rc","0.7.8","0.7.9","0.8.0","0.8.3","0.8.5","0.8.6log","0.9.0","0.9.2","0.9.5","0.9.7"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-21888.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}