{"id":"CVE-2021-34432","details":"In Eclipse Mosquitto versions 2.0.7 and earlier, the server will crash if the client tries to send a PUBLISH packet with topic length = 0.","modified":"2026-08-27T08:14:39.688848Z","published":"2021-07-27T16:15:07.893Z","references":[{"type":"FIX","url":"https://bugs.eclipse.org/bugs/show_bug.cgi?id=574141"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/eclipse-mosquitto/mosquitto","events":[{"introduced":"0"},{"last_affected":"26657053d91d1e46aeafc59f3623febee91f9d94"}],"database_specific":{"cpe":"cpe:2.3:a:eclipse:mosquitto:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"last_affected":"2.0.7"}],"source":"CPE_RANGE"}}],"versions":["v2.0.7","v2.0.6","v2.0.5","v2.0.4","v2.0.3","v2.0.2","v2.0.1","v2.0.0","v1.6.12","v1.6.11","v1.6.10","v1.6.9","v1.6.8","v1.6.7","v1.6.6","v1.6.5","v1.6.4","v1.6.3","v1.6.2","v1.6.1","v1.6","v1.5","v1.4.15","v1.4.14","v1.4.13","v1.4.12","v1.4.11","v1.4.10","v1.4.9","v1.4.8","v1.4.7","v1.4.6","v1.4.5","v1.4.4","v1.4.3","v1.4.2","v1.4.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-34432.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}