{"id":"ALPINE-CVE-2021-28166","details":"In Eclipse Mosquitto version 2.0.0 to 2.0.9, if an authenticated client that had connected with MQTT v5 sent a crafted CONNACK message to the broker, a NULL pointer dereference would occur.","modified":"2026-08-27T22:18:01.562080480Z","published":"2021-04-07T19:15:12.347Z","upstream":["CVE-2021-28166"],"references":[{"type":"ADVISORY","url":"https://security.alpinelinux.org/vuln/CVE-2021-28166"}],"affected":[{"package":{"name":"mosquitto","ecosystem":"Alpine:v3.14","purl":"pkg:apk/alpine/mosquitto?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.0.0"},{"fixed":"2.0.10-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-28166.json"}},{"package":{"name":"mosquitto","ecosystem":"Alpine:v3.15","purl":"pkg:apk/alpine/mosquitto?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.0.0"},{"fixed":"2.0.10-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-28166.json"}},{"package":{"name":"mosquitto","ecosystem":"Alpine:v3.16","purl":"pkg:apk/alpine/mosquitto?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.0.0"},{"fixed":"2.0.10-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-28166.json"}},{"package":{"name":"mosquitto","ecosystem":"Alpine:v3.17","purl":"pkg:apk/alpine/mosquitto?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.0.0"},{"fixed":"2.0.10-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-28166.json"}},{"package":{"name":"mosquitto","ecosystem":"Alpine:v3.18","purl":"pkg:apk/alpine/mosquitto?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.0.0"},{"fixed":"2.0.10-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-28166.json"}},{"package":{"name":"mosquitto","ecosystem":"Alpine:v3.19","purl":"pkg:apk/alpine/mosquitto?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.0.0"},{"fixed":"2.0.10-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-28166.json"}},{"package":{"name":"mosquitto","ecosystem":"Alpine:v3.20","purl":"pkg:apk/alpine/mosquitto?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.0.0"},{"fixed":"2.0.10-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-28166.json"}},{"package":{"name":"mosquitto","ecosystem":"Alpine:v3.21","purl":"pkg:apk/alpine/mosquitto?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.0.0"},{"fixed":"2.0.10-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-28166.json"}},{"package":{"name":"mosquitto","ecosystem":"Alpine:v3.22","purl":"pkg:apk/alpine/mosquitto?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.0.0"},{"fixed":"2.0.10-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-28166.json"}},{"package":{"name":"mosquitto","ecosystem":"Alpine:v3.23","purl":"pkg:apk/alpine/mosquitto?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.0.0"},{"fixed":"2.0.10-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-28166.json"}},{"package":{"name":"mosquitto","ecosystem":"Alpine:v3.24","purl":"pkg:apk/alpine/mosquitto?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.0.0"},{"fixed":"2.0.10-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-28166.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}