CVE-2026-85724

Summary

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.

Affected Software

VendorProductVersion RangeStatus
moquette-iomoquette< 0.18.1affected

Weaknesses

  • CWE-863: CWE-863: Incorrect Authorization
  • CWE-155: CWE-155: Improper Neutralization of Wildcards or Matching Symbols

References