moquette-io Moquette up to 0.18.0 Authenticator/Authorizator improper authorization

Summaryinfo

A vulnerability marked as critical has been reported in moquette-io Moquette up to 0.18.0. This vulnerability affects the function Server.initializeAuthenticator/Server.initializeAuthorizatorPolicy of the component Authenticator/Authorizator. The manipulation leads to improper authorization. This vulnerability is traded as CVE-2026-95848. It is possible to initiate the attack remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in moquette-io Moquette up to 0.18.0. It has been rated as critical. This issue affects the function Server.initializeAuthenticator/Server.initializeAuthorizatorPolicy of the component Authenticator/Authorizator. The manipulation with an unknown input leads to a improper authorization vulnerability. Using CWE to declare the problem leads to CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-95848 since 09/22/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1548.002 for this issue.

Upgrading to version 0.18.1 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• moquette-io

Name

• Moquette

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12
• 0.13
• 0.14
• 0.15
• 0.16
• 0.17
• 0.18.0

Website

• Product: https://github.com/moquette-io/moquette/

CPE 2.3info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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