High 8.8Published Sep 23, 2026

CVE-2026-95847Moquette client IDs can cause cross-session H2 durable-queue corruption

Updated under an hour ago (2026-10-19 06:20 UTC)

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It affects moquette-io moquette and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for moquette-io moquette

Exploited in the last 30 days

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.

CVSS: 8.8 HIGH (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N
Weakness (CWE): CWE-99
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Sep 23, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

moquette-io moquette moquette_io:moquette (from the name)	before 0.18.1	CNA record
moquette moquette moquette:moquette	before 0.18.1	NVD

References

https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhqx-refsource-confirm, exploit, mitigation, vendor-advisory
https://github.com/moquette-io/moquette/pull/964x-refsource-misc, patch
https://github.com/moquette-io/moquette/commit/72d6c8257191d2e4b2e3aa11ab25fd09f88c6cb7x-refsource-misc, patch
https://github.com/moquette-io/moquette/releases/tag/v0.18.1x-refsource-misc, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.