CVE-2026-95846
High
Description
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductMoquette
PublishedSep 23, 2026
First seenSep 23, 2026
Weakness typeCWE-862Missing authorization
How to fix
Update
- moquette moquette0.18.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| moquette moquette | v < 0.18.1 | 0.18.1 |
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