What is CVE-2026-95844?

CVE-2026-95844 is a high-severity vulnerability in Moquette, classified under Uncontrolled Recursion. CVSS score: 7.5/10. Published 2026-09-23.

How severe is CVE-2026-95844?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Moquette

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.

Published 2026-09-23 · last modified 2026-09-29.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.004 (36.7th percentile), scored 2026-11-04.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 36.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.001

Affected products

Moquette
Moquette-Io Moquette — versions < 0.18.1

Weakness classification (CWE)

CWE-674 — Uncontrolled Recursion

References

github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhq (Exploit, Mitigation, Vendor Advisory)
github.com/moquette-io/moquette/commit/ca17e0be19e86d5e291f4532dfdc94616c8e0049 (Patch)
github.com/moquette-io/moquette/releases/tag/v0.18.1 (Release Notes)

Frequently asked questions

What is CVE-2026-95844?: CVE-2026-95844 is a high-severity vulnerability in Moquette, classified under Uncontrolled Recursion. CVSS score: 7.5/10. Published 2026-09-23.
How severe is CVE-2026-95844?: High severity. CVSS v3 base score is 7.5 out of 10.