CVE-2026-95847High· 8.8▾ MidnightPoC availableMoquette 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 c…
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 48.4 · likelihood 0 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Moquette 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.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-95848Critical· 9.3Moquette is a lightweight Java MQTT broker
CVE-2026-95842High· 8.7Moquette is a lightweight Java MQTT broker
CVE-2026-95843High· 8.7Moquette is a lightweight Java MQTT broker
CVE-2026-85724Critical· 9.6Moquette is a lightweight Java MQTT broker
CVE-2026-95845High· 8.7Moquette is a lightweight Java MQTT broker
CVE-2026-95846High· 8.7Moquette is a lightweight Java MQTT broker