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CVE-2026-85058— Moquette: Missing Authorization in io.moquette:moquette-broker

Quick assessment

Affected
moquette-io moquette
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Moquette 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

CVSS 7.5 · High

Affected Version Matrix 1

VendorProduct Version RangeStatus
moquette-io moquette < 0.18.1 affected
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I. Basic Information for CVE-2026-85058

Vulnerability Information

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Vulnerability Title
Moquette: Missing Authorization in io.moquette:moquette-broker
Source: CVE Program / CVE List V5
Vulnerability Description
Moquette 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
moquette-io moquette < 0.18.1 -

II. Public POCs for CVE-2026-85058

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III. Intelligence Information for CVE-2026-85058

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Patches & Fixes for CVE-2026-85058 (2)

Vendor Advisories for CVE-2026-85058 (1)

Other References for CVE-2026-85058 (1)

IV. Related Vulnerabilities

V. Comments for CVE-2026-85058

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