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CVE

CVE-2026-95844

Moquette deeply nested MQTT topics can cause stack exhaustion
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CVE

CVE-2026-95844

Moquette deeply nested MQTT topics can cause stack exhaustion

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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.3
-
4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/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
C
H
U
0
-
C
H
U
9.6
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

Related Resources

No items found.

References

https://github.com/moquette-io/moquette/releases/tag/v0.18.1, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/95xxx/CVE-2026-95844.json, https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhq, https://nvd.nist.gov/vuln/detail/CVE-2026-95844, https://github.com/moquette-io/moquette/commit/ca17e0be19e86d5e291f4532dfdc94616c8e0049

Severity

9.6

CVSS Score
0
10

Basic Information

Base CVSS
9.6
EPSS Probability
0.00424%
EPSS Percentile
0.35281%
Introduced Version
0,0.15
Fix Available
ca17e0be19e86d5e291f4532dfdc94616c8e0049

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