CVE-2026-95848: critical vulnerability in moquette-io moquette
Moquette fails open when configured authentication or authorization classes cannot load
Published
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28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.3epss 0.4%
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.
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
Affected products
moquette-io · moquetteRelated CVEs — moquette-io moquette
In the same product, most dangerous first.
CVE-2026-85058HIGHMoquette: Missing Authorization in io.moquette:moquette-brokerEPSS 0.5%CVE-2026-95842HIGHMoquette uncaught MQTT command exceptions can terminate shared session event loopsEPSS 0.4%CVE-2026-95843HIGHMoquette malformed shared subscriptions can crash command processingEPSS 0.4%CVE-2026-95844HIGHMoquette deeply nested MQTT topics can cause stack exhaustionEPSS 0.4%CVE-2026-95845HIGHMoquette unbounded per-session message queues allow memory exhaustionEPSS 0.4%CVE-2026-95847HIGHMoquette client IDs can cause cross-session H2 durable-queue corruptionEPSS 0.3%