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    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.

    Published:Sep 23, 2026
    Last Modified:Sep 25, 2026
    EPS:Sep 23, 2026
    EPSS Score:0.00262
    CVSS Score:9.6

    Affected Products

    Vendor
    Moquette
    Product
    Moquette
    Vendor
    Moquette-io
    Product
    Moquette

    Exploits

    https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhqhttps://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhq

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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    CVE-2026-95845 (CVSS 8.7) — Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, the broker does not enforce a maximum length for …
    CVE-2026-95844 (CVSS 8.7) — Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, Moquette does not limit the depth of topic names …
    CVE-2026-95843 (CVSS 8.7) — Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, PostOffice.subscribe parses a shared-subscription…
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High