Reachable assertion in Eclipse Mosquitto
Priority MEDIUM 59CWE-617Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-617.
Summary
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.
Why it matters now
EPSS 0.36013 98th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Eclipse Foundation | Eclipse Mosquitto | 1.5 and later; up to 1.5.2 | — | No fix listed | CNA |
- Eclipse Mosquitto VendorEclipse Foundation Affected 1.5 and later; up to 1.5.2 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:eclipse:mosquitto:*:*:*:*:*:*:*:* | 1.5.0 – 1.5.2 | Vulnerable | Eclipse Foundation |
- cpe:2.3:a:eclipse:mosquitto:*:*:*:*:*:*:*:* Versions 1.5.0 – 1.5.2 Vulnerable ·Eclipse Foundation
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2018-12543
- 2026-10-03 Alias added: GHSA-4g6q-vx9q-q84r
References
More Eclipse Foundation Mosquitto vulnerabilities
- TI-2024-09749 Eclipse Mosquito: Heap Buffer Overflow in my_subscribe_callback CVSS 4.0HIGH 7.2
- TI-2023-12912 The broker in Eclipse Mosquitto 1.3.2 through 2.x before 2.0.16 has a memory leak that… CVSS 3.1HIGH 7.5
- TI-2017-05287 Uncontrolled resource consumption in Eclipse Mosquitto CVSS 3.0HIGH 7.5
- TI-2023-05183 Unconditionally adding an event to the epoll causes excessive CPU consumption CVSS 3.1HIGH 7.5
- TI-2018-09010 Improper authentication in Eclipse Mosquitto CVSS 3.0HIGH 8.1
- TI-2018-09009 When Eclipse Mosquitto version 1.0 to 1.5.5 (inclusive) is configured to use an ACL file… CVSS 3.0HIGH 8.1
Sources
- CVE-2018-12543 · CVE Program
- CVE-2018-12543 · NVD
- FIRST EPSS
- GHSA-4g6q-vx9q-q84r · GitHub Advisory Database · CC BY 4.0
- CVE-2018-12543 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences