CVE-2025-62723 json
FlashMQ does not release memory of queued QoS messages
published 2025-10-24 12 mo ago modified 2026-10-08 32 d ago also EUVD-2025-35890
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 27%
- public exploits
- 0
- none known
Summary
FlashMQ is a MQTT broker/server, designed for multi-CPU environments. Prior to version 1.23.2, any authenticated user can create sessions and have them collect QoS messages. When not sent to a client, these are then not released upon (eventual) session expiration. Version 1.23.2 fixes the issue.
Patch / fix
- flashmq flashmq 1.23.2
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 12 mo ago
Exploit prediction
0.34% chance of exploitation in the next 30 days, higher than 27% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L |
Affected products
- halfgaar FlashMQ
Classification
- Weakness
-
- CWE-772 Missing Release of Resource after Effective Lifetime
References
-
github.com
/halfgaar/FlashMQ/commit/e86c49360ef4387440c97f591770cdb9284b4ee9
patch
-
github.com
/halfgaar/FlashMQ/security/advisories/GHSA-7mhp-22q4-r6vv
patch, vendor-advisory
-
github.com
/halfgaar/FlashMQ/issues/154
issue-tracking
Sources
- CVE List CVE-2025-62723
- NVD CVE-2025-62723
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