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    <lastBuildDate>Wed, 30 Sep 2026 10:41:02 +0000</lastBuildDate>
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      <title>CVE-2026-85724 — Moquette pattern ACL wildcard injection allows cross-tenant authorization bypass</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-85724</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; moquette-io moquette&lt;/p&gt;
&lt;p&gt;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.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; moquette-io moquette&lt;/p&gt;
&lt;p&gt;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.&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://vulnerability.circl.lu/vuln/cve-2026-85724</guid>
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