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/test, then an assert is triggered that should otherwise not be reachable and Mosquitto will…
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 36.0%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.
Description
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/test, then an assert is triggered that should otherwise not be reachable and Mosquitto will exit.
- CVSS 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 36.01% probability · 98th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-617, CWE-20
- Affected
- eclipse/mosquitto
- Source
- emo@eclipse.org
EPSS moved from 34.1% on 21 September 2026 to 36.0% on 27 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
References
- https://bugs.eclipse.org/bugs/show_bug.cgi?id=539295Issue Tracking, Vendor Advisory
- https://bugs.eclipse.org/bugs/show_bug.cgi?id=539295Issue Tracking, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.