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CVE-2026-46411

FlashMQ: Client can trigger uncaught exception on FlashMQ 1.26.1 and older

Published: Jun 9, 2026Updated: Jun 9, 2026 Sources: CVE List
NVD MITRE
6.5CVSS
MEDIUM

FlashMQ is a MQTT broker/server, designed for multi-CPU environments. Prior to version 1.26.2, authorized clients have the ability to exceed the permitted over-commit of their write buffer and triggering an internal safe-guard exception. This exception was in a path that was not catchable, and therefore causes a server abort. This issue has been patched in version 1.26.2.

EPSS Score
N/A
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High

Weaknesses

CWE-248CWE-248: Uncaught Exception

Affected Products

FlashMQ
halfgaar

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

References

https://github.com/halfgaar/FlashMQ/security/advisories/GHSA-g35r-265r-rxrh
github.com
https://github.com/halfgaar/FlashMQ/commit/29e08f7b97b6e3f96db923c2b6a260c47b49c195
github.com
https://github.com/halfgaar/FlashMQ/releases/tag/v1.26.2
github.com

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