Vulnerability details

CVE-2026-95847

moquette-io moquette

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

CVSS 4.0

8.8High

Official description

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 scores

Score	Version	Source	Vector
8.8High	4.0	CVEProject cvelistV5 (CNA) (GitHub_M)	`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`

Affected products

Vendor	Product	Versions	Source
moquette-io	moquette	< 0.18.1	CVEProject cvelistV5 (CNA)

References and advisories

https://github.com/moquette-io/moquette/pull/964 x_refsource_MISC
https://github.com/moquette-io/moquette/commit/72d6c8257191d2e4b2e3aa11ab25fd09f88c6cb7 x_refsource_MISC
https://github.com/moquette-io/moquette/releases/tag/v0.18.1 x_refsource_MISC
https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhq x_refsource_CONFIRM

Kolun on Telegram @kolunsec Exploited CVEs, key news and a daily digest Alerts for this product's next CVEsFollow the product to get new vulnerabilities on Telegram.

Details

Published: 2026-09-23
Last updated: 2026-09-23
State: Published
Assigner (CNA): GitHub_M

Exploit prediction (EPSS)

0.34%

Probability of exploitation in 30 days

27.7%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: Yes
Exploitation: Proof of concept
Technical impact: Partial

Weaknesses (CWE)

CWE-99
Improper Control of Resource Identifiers ('Resource Injection')