Skip to main content
VulnerabilityPublished

CVE-2026-46411: halfgaar FlashMQ · Uncaught Exception

Affects halfgaar FlashMQSource CVE Database V5

0
Compare

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

CVSS 3.1 base score
6.5Medium
How severe the flaw is on the 0–10 CVSS scale.
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:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 9 Jun 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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

ProductAffectedFixed in
halfgaarFlashMQAffected
  • <1.26.2
Fixed in
  • 1.26.2
GitHubhalfgaar/FlashMQpkg:github/halfgaar/FlashMQOther threatsAffected
  • <1.26.2
Fixed in
  • 1.26.2

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.

References

Community reviews

Loading reviews…