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This affects the mosquitto_sub and mosquitto_rr clients.",7.2,"v4.0","High",0.59222,{"cveId":398,"description":399,"publishedDate":400,"cvssScore":401,"cvssVersion":402,"severity":395,"isKev":16,"epssScore":403},"CVE-2018-12543","In Eclipse Mosquitto versions 1.5 to 1.5.2 inclusive, if a message is published to Mosquitto that has a topic starting with $, but that is not $SYS, e.g. $test\u002Ftest, then an assert is triggered that should otherwise not be reachable and Mosquitto will exit.","2018-11-15",7.5,"v3.0",0.36013,{"cveId":405,"description":406,"publishedDate":407,"cvssScore":401,"cvssVersion":402,"severity":395,"isKev":16,"epssScore":408},"CVE-2017-7651","In Eclipse Mosquitto 1.4.14, a user can shutdown the Mosquitto server simply by filling the RAM memory with a lot of connections with large payload. This can be done without authentications if occur in connection phase of MQTT protocol.","2018-04-24",0.05116,{"cveId":410,"description":411,"publishedDate":412,"cvssScore":413,"cvssVersion":414,"severity":415,"isKev":16,"epssScore":416},"CVE-2019-11779","In Eclipse Mosquitto 1.5.0 to 1.6.5 inclusive, if a malicious MQTT client sends a SUBSCRIBE packet containing a topic that consists of approximately 65400 or more '\u002F' characters, i.e. the topic hierarchy separator, then a stack overflow will occur.","2019-09-19",6.5,"v3.1","Medium",0.02742,{"cveId":418,"description":419,"publishedDate":420,"cvssScore":413,"cvssVersion":402,"severity":415,"isKev":16,"epssScore":421},"CVE-2017-7650","In Mosquitto before 1.4.12, pattern based ACLs can be bypassed by clients that set their username\u002Fclient id to '#' or '+'. This allows locally or remotely connected clients to access MQTT topics that they do have the rights to. The same issue may be present in third party authentication\u002Faccess control plugins for Mosquitto.","2017-09-11",0.02472,{"cveId":423,"description":424,"publishedDate":425,"cvssScore":401,"cvssVersion":402,"severity":395,"isKev":16,"epssScore":426},"CVE-2017-7654","In Eclipse Mosquitto 1.4.15 and earlier, a Memory Leak vulnerability was found within the Mosquitto Broker. Unauthenticated clients can send crafted CONNECT packets which could cause a denial of service in the Mosquitto Broker.","2018-06-05",0.02158,{"cveId":428,"description":429,"publishedDate":430,"cvssScore":401,"cvssVersion":414,"severity":395,"isKev":16,"epssScore":431},"CVE-2017-7655","In Eclipse Mosquitto version from 1.0 to 1.4.15, a Null Dereference vulnerability was found in the Mosquitto library which could lead to crashes for those applications using the library.","2019-03-27",0.01762,{"cveId":433,"description":434,"publishedDate":435,"cvssScore":401,"cvssVersion":402,"severity":395,"isKev":16,"epssScore":436},"CVE-2018-20145","Eclipse Mosquitto 1.5.x before 1.5.5 allows ACL bypass: if the option per_listener_settings was set to true, and the default listener was in use, and the default listener specified an acl_file, then the acl file was being ignored.","2018-12-13",0.01645,{"cveId":438,"description":439,"publishedDate":440,"cvssScore":401,"cvssVersion":402,"severity":395,"isKev":16,"epssScore":441},"CVE-2017-7652","In Eclipse Mosquitto 1.4.14, if a Mosquitto instance is set running with a configuration file, then sending a HUP signal to server triggers the configuration to be reloaded from disk. If there are lots of clients connected so that there are no more file descriptors\u002Fsockets available (default limit typically 1024 file descriptors on Linux), then opening the configuration file will fail.","2018-04-25",0.01621,{"cveId":443,"description":444,"publishedDate":430,"cvssScore":445,"cvssVersion":402,"severity":395,"isKev":16,"epssScore":446},"CVE-2018-12551","When Eclipse Mosquitto version 1.0 to 1.5.5 (inclusive) is configured to use a password file for authentication, any malformed data in the password file will be treated as valid. This typically means that the malformed data becomes a username and no password. If this occurs, clients can circumvent authentication and get access to the broker by using the malformed username. In particular, a blank line will be treated as a valid empty username. Other security measures are unaffected. Users who have only used the mosquitto_passwd utility to create and modify their password files are unaffected by this vulnerability.",8.1,0.01475,[],{"title":449,"metaDescription":450,"keywords":451,"structuredData":452},"Mosquitto by Eclipse - Security Vulnerabilities & Analysis | Precursor Intelligence","Comprehensive security analysis for Mosquitto by Eclipse covering 124 versions with 26 tracked vulnerabilities. Real-time threat intelligence, CVE tracking, and security recommendations.","Mosquitto vulnerabilities, Mosquitto security, Mosquitto CVE, Eclipse Mosquitto, Mosquitto threat intelligence, Eclipse security, product security analysis, cybersecurity threats, vulnerability management, CVE tracking",{"@context":453,"@type":454,"name":455,"description":450,"url":456,"manufacturer":457,"applicationCategory":461,"softwareVersion":462,"mainEntity":463},"https:\u002F\u002Fschema.org","SoftwareApplication","Mosquitto","https:\u002F\u002Fprecursorintelligence.com\u002Fvulnerabilities\u002Ftechnologies\u002Fvendors\u002Feclipse\u002Fmosquitto",{"@type":458,"name":459,"url":460},"Organization","Eclipse","https:\u002F\u002Fprecursorintelligence.com\u002Fvendors\u002Feclipse","Security Software","124 versions tracked",{"@type":464,"name":465,"description":466,"vulnerabilityCount":10,"dateModified":12},"SecurityVulnerability","Mosquitto Security Vulnerabilities","Security vulnerabilities affecting Mosquitto by Eclipse",{"totalVersions":9,"totalVulnerabilities":10,"kevVulnerabilities":11,"lastUpdated":12,"generatedAt":468,"apiVersion":469},"2026-10-17T22:17:07.549Z","3.0",{"rows":471,"total":11,"capped":16,"failed":11},[],[]]