CVE-2026-95846: high-severity vulnerability in moquette-io moquette
Moquette publishes Last-Will messages without enforcing write authorization
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.7epss 0.3%
Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, PostOffice.publishWill publishes a client's Last-Will message without applying the canWrite authorization and reserved-topic checks used for a normal PUBLISH. A client can configure a Will for a topic that the client is not permitted to write and cause the broker to publish the unauthorized message when the client disconnects unexpectedly. This issue allows unauthorized message injection into restricted topics. This issue is fixed in version 0.18.1.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/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 0.6%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-2026-95848CRITICALMoquette fails open when configured authentication or authorization classes cannot loadEPSS 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%