CVE-2026-95848

Critical

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.

SeverityCritical
CVSS9.1
Exploit probability—
ProductMoquette
PublishedSep 23, 2026
First seenSep 23, 2026
Weakness typeCWE-636CWE-636

How to fix

Update
  • moquette moquette0.18.1 or later

Affected products

ProductAffected versionsFixed in
moquette moquettev < 0.18.10.18.1

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