CVE-2026-46411: halfgaar FlashMQ · Uncaught Exception
Affects halfgaar FlashMQSource CVE Database V5
Not known to be exploited · CVSS 6.5 Medium : upgrade to 1.26.2 when convenient.
Data as of 30 Oct 2026, 11:52 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 22% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 1.26.2
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 9 Jun 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.
What to do
Upgrade FlashMQ and halfgaar/FlashMQ to 1.26.2.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| halfgaarFlashMQ | Affected
| Fixed in
|
GitHubhalfgaar/FlashMQpkg:github/halfgaar/FlashMQOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A fix is available in FlashMQ version 1.26.2. Users should upgrade to version 1.26.2 or later to remediate this vulnerability. No other mitigation guidance is provided or necessary as the issue is resolved by the patch.
Description
CVE-2026-46411 is a vulnerability in halfgaar FlashMQ, an MQTT broker/server. Prior to version 1.26.2, authorized clients could cause the server to abort by exceeding the allowed write buffer over-commit, triggering an uncaught internal exception. This issue has been fixed in version 1.26.2.