Denial of Service in Moquette MQTT Broker Affects Remote Client Functionality
CVE-2026-95844

8.7HIGH

Key Information:

Vendor

Moquette-io

Status
Moquette
Vendor
CVE Published:
23 September 2026

What is CVE-2026-95844?

The Moquette MQTT Broker, prior to version 0.18.1, is vulnerable due to the lack of limits on the depth of topic names and filters during processing. A remote attacker could exploit this by publishing or subscribing with overly nested topics, leading to a StackOverflowError. This error interrupts session handling and could result in service disruption for legitimate users of the broker. The vulnerability has been remediated in version 0.18.1, making it essential for users to update to maintain service integrity.

Affected Version(s)

moquette < 0.18.1

References

https://github.com/moquette-io/moquette/security/advisori...
x_refsource_CONFIRM
https://github.com/moquette-io/moquette/commit/ca17e0be19...
x_refsource_MISC
https://github.com/moquette-io/moquette/releases/tag/v0.18.1
x_refsource_MISC

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.