CVE WatchSep 23, 2026

CVE-2026-85724

Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, when pattern-based ACL rules are configured, AuthorizationsCollector.canDoOpera

CVSS

9.6

Critical

EPSS

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KEV

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Exploit Today

0-100

Published: Sep 23, 2026 · Last modified: Sep 23, 2026 · CWE-155 · CWE-863

EPSS · 30d

Not enough EPSS history yet.

Technical description

Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, when pattern-based ACL rules are configured, AuthorizationsCollector.canDoOperation substitutes client ID and username values directly into rules containing %c or %u and then treats the result as an MQTT topic filter. A client that uses + or # in either identity can broaden the substituted filter and gain cross-tenant read and write access. A # identity can also produce an invalid filter that triggers a NullPointerException in Topic.match and disrupts session processing. This issue is fixed in version 0.18.1.

Official references

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