Resource exhaustion in Moquette
CVE-2026-95845
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.
Published · last modified .
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 (35.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 35.8% 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)
References
- github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhq (Exploit, Mitigation, Vendor Advisory)
- github.com/moquette-io/moquette/commit/2482cadfba44e615be704b892009a57ce06a1aba (Patch)
- github.com/moquette-io/moquette/releases/tag/v0.18.1 (Release Notes)
Frequently asked questions
- What is CVE-2026-95845?
- CVE-2026-95845 is a high-severity vulnerability in Moquette, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-09-23.
- How severe is CVE-2026-95845?
- High severity. CVSS v3 base score is 7.5 out of 10.