Moquette: Missing Authorization in io.moquette:moquette-broker

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-85058
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-18 18:17:17 UTC
Updated2026-09-18 18:17:17 UTC
DescriptionMoquette is a lightweight Java MQTT broker. Prior to 0.18.1, PostOffice.publishWill publishes a client-controlled Last Will message through publish2Subscribers without invoking the authorizator.canWrite check used by normal PUBLISH paths. When anonymous access is enabled and topic ACLs restrict writes, a remote client can set an ACL-protected topic as the Last Will Topic during CONNECT and perform an abnormal client disconnect, causing the broker to inject attacker-controlled messages into a topic for which the client lacks write permission. This issue is fixed in version 0.18.1.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS: 0.002700000 probability, percentile 0.194830000 (date 2026-09-21)

Problem Types: CWE-862 | CWE-862 CWE-862: Missing Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Moquette-io Moquette affected < 0.18.1 Not specified

References

ReferenceSourceLinkTags
github.com/moquette-io/moquette/security/advisories/GHSA-9jjc-fw8x-fmwx [email protected] github.com
github.com/moquette-io/moquette/commit/f5a323fe782d1505c0097498cb22eb6ec... [email protected] github.com
github.com/moquette-io/moquette/releases/tag/v0.18.1 [email protected] github.com
github.com/moquette-io/moquette/commit/e23df019f6a11e22c7d2047d4f86d0709... [email protected] github.com
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