CVE-2026-95844

Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, Moquette does not limit the depth of topic names and topic filters before processing them through recursive CTrie insertion and matching operations. A remote client can publish or subscribe with a deeply nested topic, causing a StackOverflowError that disrupts session processing and can deny service to broker clients. This issue is fixed in version 0.18.1.

• CWE-674

• https://github.com/moquette-io/moquette/commit/ca17e0be19e86d5e291f4532dfdc94616c8e0049Patch
• https://github.com/moquette-io/moquette/releases/tag/v0.18.1Release Notes
• https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhqExploit, Mitigation, Vendor Advisory
• https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhqExploit, Mitigation, Vendor Advisory

Published

Sep 23, 2026

Last Modified

Sep 29, 2026

Status

Modified

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