Mosquitto vulnerabilitiesRanked by how likely they are to be used.

Product124 versions
The short answer

Mosquitto is made by Eclipse. We track 26 published vulnerabilities in it, across 124 versions. None of them is on the list of flaws known to be exploited today. If you run Mosquitto, keep it on a version the vendor still supports.

See the riskiest flaws

We keep watching the known-exploited list.

Known exploited

Which Mosquitto vulnerabilities are being exploited?

This is the list that matters most: flaws criminals are using now.

None of Mosquitto's published vulnerabilities is on the list of flaws known to be exploited today. We keep watching that list.

Exploit likelihood

Which Mosquitto flaws are most likely to be used?

Ranked by the latest exploit-likelihood forecast: the chance each flaw is used in an attack in the next 30 days. A high severity score on its own doesn't tell you that. Flaws shared by many other makers' products are left out.

50% or more10% to 49%Under 10%
  1. 59%

    In Eclipse Mosquitto, from version 1.3.2 through 2.0.18, if a malicious broker sends a crafted SUBACK packet with no reason codes, a client using libmosquitto may make out of bounds memory access when acting in its...

    CVSS7.2Published30 Oct 2024
  2. 36%

    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.

    CVSS7.5Published15 Nov 2018
  3. 5.1%

    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.

    CVSS7.5Published24 Apr 2018
  4. 2.7%

    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 '/' characters, i.e.

    CVSS6.5Published19 Sep 2019
  5. 2.5%

    In Mosquitto before 1.4.12, pattern based ACLs can be bypassed by clients that set their username/client id to '#' or '+'.

    CVSS6.5Published11 Sep 2017
  6. 2.2%

    In Eclipse Mosquitto 1.4.15 and earlier, a Memory Leak vulnerability was found within the Mosquitto Broker.

    CVSS7.5Published5 Jun 2018
  7. 1.8%

    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.

    CVSS7.5Published27 Mar 2019
  8. 1.6%

    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...

    CVSS7.5Published13 Dec 2018
  9. 1.6%

    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.

    CVSS7.5Published25 Apr 2018
  10. 1.5%

    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.

    CVSS8.1Published27 Mar 2019
Precursor Intelligence

Running Mosquitto? We'll keep checking.

Looking flaws up one at a time doesn't scale. Tell us what you run once, and we tell you which flaws matter to you, in what order, and keep watching for new ones.

  1. Tell us what you runPick your software from a list, or let us work it out from your website.
  2. We match it to every flawOver 400,000 published flaws, checked against your list.
  3. Ranked by real-world riskA 0 to 100 score, led by evidence criminals are using it.
  4. Told as soon as we knowAn alert by email, in the app or by webhook to your own tools.

Free plan, no card needed. Nothing to install.

FAQ

Common questions, answered plainly.

Something else? Talk to the team →

We track 26 published vulnerabilities listed under the name Mosquitto, across 124 versions.

None of Mosquitto's vulnerabilities is on the list of flaws known to be exploited today.

Create a Precursor Intelligence account and track Mosquitto. We match it against every published flaw, give each one a risk score from 0 to 100 and keep watching, so you hear about new ones as soon as we know, by email, in the app or by webhook.