CVE-2026-95848
Moquette fails open when configured authentication or authorization classes cannot load
- State
- Published
- Severity
- 9.3 Critical
- Published
- Sep 23, 2026
- Updated
- Sep 23, 2026
- Reserved
- Sep 22, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.3 Critical | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N | GitHub_M |
Weaknesses
- CWE-636 Not Failing Securely ('Failing Open')
Affected Products
| Product | Versions |
|---|---|
moquettemoquette-io |
|
References
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