Vulnerability Details CVE-2026-85724
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 17.2%
CVSS Severity
CVSS v3 Score 9.6
References
- https://github.com/moquette-io/moquette/commit/b4a98bb3f3425ece476ed073aa080c627c1239af
- https://github.com/moquette-io/moquette/releases/tag/v0.18.1
- https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhq
- https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhq
Products affected by CVE-2026-85724
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cpe:2.3:a:moquette:moquette:0.10
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cpe:2.3:a:moquette:moquette:0.11
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cpe:2.3:a:moquette:moquette:0.12
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cpe:2.3:a:moquette:moquette:0.12.1
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cpe:2.3:a:moquette:moquette:0.13
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cpe:2.3:a:moquette:moquette:0.14
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cpe:2.3:a:moquette:moquette:0.14.1
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cpe:2.3:a:moquette:moquette:0.14.2
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cpe:2.3:a:moquette:moquette:0.14.3
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cpe:2.3:a:moquette:moquette:0.15
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cpe:2.3:a:moquette:moquette:0.15.1
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cpe:2.3:a:moquette:moquette:0.15.2
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cpe:2.3:a:moquette:moquette:0.16
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cpe:2.3:a:moquette:moquette:0.17.0
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cpe:2.3:a:moquette:moquette:0.18.0
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cpe:2.3:a:moquette:moquette:0.7
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cpe:2.3:a:moquette:moquette:0.8
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cpe:2.3:a:moquette:moquette:0.8.1
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cpe:2.3:a:moquette:moquette:0.9