CVE-2024-42655 json
An access control issue in NanoMQ v0.21.10 allows attackers to bypass security restrictions and access sensitive system topic messages usin…
published 2025-07-29 15 mo ago modified 2026-06-17 4 mo ago also EUVD-2024-54835
- cvss
- 8.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 37%
- public exploits
- 0
- none known
Summary
An access control issue in NanoMQ v0.21.10 allows attackers to bypass security restrictions and access sensitive system topic messages using MQTT wildcard characters.
Patch / fix
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- total
- Assessed
- 15 mo ago
Exploit prediction
0.43% chance of exploitation in the next 30 days, higher than 37% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/nanomq/nanomq/issues/1782#issuecomment-2171025812 referenced PoC, tagged "exploit" by a source, unverified
- github.com https://github.com/songxpu/bug_report/blob/master/MQTT/NanoMQ/CVE-2024-42655.md referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
Classification
- Weakness
-
- CWE-284 Improper Access Control
References
-
github.com
/nanomq/nanomq/issues/1782#issuecomment-2171025812
exploit, issue-tracking, patch
-
github.com
/songxpu/bug_report/blob/master/MQTT/NanoMQ/CVE-2024-42655.md
exploit, third-party-advisory
-
github.com
/nanomq/nanomq
product
Sources
- CVE List CVE-2024-42655
- NVD CVE-2024-42655
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.