Description
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.
Affected products
moquette: moquette
References4
- github.com/moquette-io/moquette/security/advisories/GHSA-5f42-9… ExploitMitigationVendor Advisory
- github.com/moquette-io/moquette/security/advisories/GHSA-5f42-9… ExploitMitigationVendor Advisory
- github.com/moquette-io/moquette/commit/ca17e0be19e86d5e291f4532… Patch
- github.com/moquette-io/moquette/releases/tag/v0.18.1 Release Notes
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 4.0
-
8.7
HIGH
Score source: CNA
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 0% percentile: 37 · as of 9 November 2026
- CWE
- CWE-674
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