{"id":"ALPINE-CVE-2018-12550","details":"When Eclipse Mosquitto version 1.0 to 1.5.5 (inclusive) is configured to use an ACL file, and that ACL file is empty, or contains only comments or blank lines, then Mosquitto will treat this as though no ACL file has been defined and use a default allow policy. The new behaviour is to have an empty ACL file mean that all access is denied, which is not a useful configuration but is not unexpected.","modified":"2026-07-08T04:30:13.937259804Z","published":"2019-03-27T18:29:00.303Z","upstream":["CVE-2018-12550"],"references":[{"type":"ADVISORY","url":"https://security.alpinelinux.org/vuln/CVE-2018-12550"}],"affected":[{"package":{"name":"mosquitto","ecosystem":"Alpine:v3.10","purl":"pkg:apk/alpine/mosquitto?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.0"},{"fixed":"1.5.6-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2018-12550.json"}},{"package":{"name":"mosquitto","ecosystem":"Alpine:v3.11","purl":"pkg:apk/alpine/mosquitto?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.0"},{"fixed":"1.5.6-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2018-12550.json"}},{"package":{"name":"mosquitto","ecosystem":"Alpine:v3.12","purl":"pkg:apk/alpine/mosquitto?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.0"},{"fixed":"1.5.6-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2018-12550.json"}},{"package":{"name":"mosquitto","ecosystem":"Alpine:v3.13","purl":"pkg:apk/alpine/mosquitto?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.0"},{"fixed":"1.5.6-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2018-12550.json"}},{"package":{"name":"mosquitto","ecosystem":"Alpine:v3.14","purl":"pkg:apk/alpine/mosquitto?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.0"},{"fixed":"1.5.6-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2018-12550.json"}},{"package":{"name":"mosquitto","ecosystem":"Alpine:v3.15","purl":"pkg:apk/alpine/mosquitto?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.0"},{"fixed":"1.5.6-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2018-12550.json"}},{"package":{"name":"mosquitto","ecosystem":"Alpine:v3.16","purl":"pkg:apk/alpine/mosquitto?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.0"},{"fixed":"1.5.6-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2018-12550.json"}},{"package":{"name":"mosquitto","ecosystem":"Alpine:v3.17","purl":"pkg:apk/alpine/mosquitto?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.0"},{"fixed":"1.5.6-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2018-12550.json"}},{"package":{"name":"mosquitto","ecosystem":"Alpine:v3.18","purl":"pkg:apk/alpine/mosquitto?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.0"},{"fixed":"1.5.6-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2018-12550.json"}},{"package":{"name":"mosquitto","ecosystem":"Alpine:v3.19","purl":"pkg:apk/alpine/mosquitto?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.0"},{"fixed":"1.5.6-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2018-12550.json"}},{"package":{"name":"mosquitto","ecosystem":"Alpine:v3.20","purl":"pkg:apk/alpine/mosquitto?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.0"},{"fixed":"1.5.6-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2018-12550.json"}},{"package":{"name":"mosquitto","ecosystem":"Alpine:v3.21","purl":"pkg:apk/alpine/mosquitto?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.0"},{"fixed":"1.5.6-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2018-12550.json"}},{"package":{"name":"mosquitto","ecosystem":"Alpine:v3.22","purl":"pkg:apk/alpine/mosquitto?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.0"},{"fixed":"1.5.6-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2018-12550.json"}},{"package":{"name":"mosquitto","ecosystem":"Alpine:v3.23","purl":"pkg:apk/alpine/mosquitto?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.0"},{"fixed":"1.5.6-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2018-12550.json"}},{"package":{"name":"mosquitto","ecosystem":"Alpine:v3.24","purl":"pkg:apk/alpine/mosquitto?arch=source"},"ranges":[{"t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