23 Oct 2026 15:48:27 UTC
Moquette client IDs can cause cross-session H2 durable-queue corruption
cve-program · CVE-2026-95847 · Published
CVE-2026-95847
Moquette client IDs can cause cross-session H2 durable-queue corruption
CVSS 4.0 8.8 HIGHCheck source for fixed versionsKEV status unknown
cve-program · CVE-2026-95847
PublishedMoquette is a lightweight Java MQTT broker. Prior to 0.18.1, H2PersistentQueue derives a session's message-map name as queue_ plus the client ID and its metadata-map name as queue_ plus the client ID plus _meta. A durable session whose client ID ends in _meta can therefore make its message map collide with another client's metadata map. The colliding sessions read and write the same H2 MVStore map with incompatible value types, which can corrupt queue head and tail data and cause message loss, misdelivery, failed queue reloads, or exposure of queued content across sessions. This issue is fixed in version 0.18.1.
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