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CVE

CVE-2026-95846

Moquette publishes Last-Will messages without enforcing write authorization
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CVE

CVE-2026-95846

Moquette publishes Last-Will messages without enforcing write authorization

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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.3
-
4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
C
H
U
0
-
C
H
U
9.6
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

Related Resources

No items found.

References

https://github.com/moquette-io/moquette/releases/tag/v0.18.1, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/95xxx/CVE-2026-95846.json, https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhq, https://nvd.nist.gov/vuln/detail/CVE-2026-95846, https://github.com/moquette-io/moquette/commit/f5a323fe782d1505c0097498cb22eb6ec6c96973

Severity

9.6

CVSS Score
0
10

Basic Information

Base CVSS
9.6
EPSS Probability
0.00424%
EPSS Percentile
0.35281%
Introduced Version
0,0.15
Fix Available
f5a323fe782d1505c0097498cb22eb6ec6c96973

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