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CVE-2026-95848

9.1, critical

Moquette is a lightweight Java MQTT broker

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
9.1, critical critical CVSS v3.1
EPSS, next 30 days
0.4% higher than 35.1% of scored CVEs
Exploitation
Exploit code published
Published
23 Sept 202625 days ago

Description

Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, when a configured authenticator or authorizator class cannot be loaded, Server.initializeAuthenticator and Server.initializeAuthorizatorPolicy treat the failure as though no custom class was configured and fall back to AcceptAllAuthenticator or PermitAllAuthorizatorPolicy. A misspelled class name, missing dependency, constructor failure, or classpath problem can therefore start the broker with authentication or authorization disabled even though the operator configured those controls. This issue is fixed in version 0.18.1.

Details

Vendor
Moquette-io
Product
moquette
Weakness
CWE-636 (opens in a new tab)
Status
Analyzed
Updated
28 Sept 2026
Assigner
security-advisories@github.com

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

References 4

Exploit code 1

Patches and fixes 2

Other references 1

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other Moquette-io CVEs

Every Moquette-io CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2026-95842 Moquette is a lightweight Java MQTT broker EPSS 0.4% 7.5, high
  • CVE-2026-95843 Moquette-io moquette Improper Input Validation Vulnerability EPSS 0.4% 7.5, high
  • CVE-2026-95844 Moquette is a lightweight Java MQTT broker EPSS 0.4% 7.5, high
  • CVE-2026-95845 Moquette-io moquette Allocation of Resources Without Limits or Throttling Vulnerability EPSS 0.4% 7.5, high
  • CVE-2026-95846 Moquette-io moquette Missing Authorization Vulnerability EPSS 0.3% 7.5, high
  • CVE-2026-95847 Moquette is a lightweight Java MQTT broker EPSS 0.3% 7.5, high

Beyond this page

Is CVE-2026-95848 in your network?

This page tells you how dangerous CVE-2026-95848 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

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  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

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Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 17 Oct 2026, not the live upstream state.