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Vulnerability record · CVE-2026-95845 · published 23 September 2026

CVE-2026-95845: Moquette allocation without limits vulnerability

Moquette · Moquette

Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, the broker does not enforce a maximum length for pending per-session message queues. When a fast publisher sends messages to a slow subscriber whose in-flight window is full, queued messages can accumulate without bound in memory or persistent storage. Remote clients can use this condition to exhaust broker resources and cause a denial of service. This issue is fixed in version 0.18.1.

8.7 CVSS 4.0 High EPSS 0.36% · top 73.0% CWE-770 · Allocation without limits
8.7CVSS 4.0 base score
0.36%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References, 1 tagged exploit
25 Sep 2026Last modified by NVD

Description

Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, the broker does not enforce a maximum length for pending per-session message queues. When a fast publisher sends messages to a slow subscriber whose in-flight window is full, queued messages can accumulate without bound in memory or persistent storage. Remote clients can use this condition to exhaust broker resources and cause a denial of service. This issue is fixed in version 0.18.1.

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:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/moquette-io/moquette/commit/2482cadfba44e615be704b892009a57ce06a1aba Patch
https://github.com/moquette-io/moquette/releases/tag/v0.18.1 Release Notes
https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhq ExploitMitigationVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-95845), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.