{"id":"CVE-2026-85724","state":"PUBLISHED","title":"Moquette pattern ACL wildcard injection allows cross-tenant authorization bypass","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.","publishedAt":"2026-09-23T16:29:36.296Z","updatedAt":"2026-09-24T14:19:04.429Z","severity":{"score":9.6,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["moquette-io moquette"],"affected":[{"vendor":"moquette-io","product":"moquette","versions":[{"version":"< 0.18.1","status":"affected"}]}],"references":["https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhq","https://github.com/moquette-io/moquette/commit/b4a98bb3f3425ece476ed073aa080c627c1239af","https://github.com/moquette-io/moquette/releases/tag/v0.18.1"],"weaknesses":["CWE-863","CWE-155"],"ingestedAt":"2026-10-29T20:13:15.269Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/85xxx/CVE-2026-85724.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-85724","state":"PUBLISHED","datePublished":"2026-09-23T16:29:36.296Z","dateUpdated":"2026-09-24T14:19:04.429Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-09-04T14:45:10.648Z"},"containers":{"cna":{"title":"Moquette pattern ACL wildcard injection allows cross-tenant authorization bypass","descriptions":[{"lang":"en","value":"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":[{"vendor":"moquette-io","product":"moquette","versions":[{"version":"< 0.18.1","status":"affected"}]}],"references":[{"url":"https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhq","name":"https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhq","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/moquette-io/moquette/commit/b4a98bb3f3425ece476ed073aa080c627c1239af","name":"https://github.com/moquette-io/moquette/commit/b4a98bb3f3425ece476ed073aa080c627c1239af","tags":["x_refsource_MISC"]},{"url":"https://github.com/moquette-io/moquette/releases/tag/v0.18.1","name":"https://github.com/moquette-io/moquette/releases/tag/v0.18.1","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":9.6,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-863","lang":"en","description":"CWE-863: Incorrect Authorization","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-155","lang":"en","description":"CWE-155: Improper Neutralization of Wildcards or Matching Symbols","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-23T16:29:36.296Z"},"source":{"advisory":"GHSA-5f42-97gr-vfhq","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhq","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-24T14:18:56.863679Z","id":"CVE-2026-85724","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-24T14:19:04.429Z"}}]}}}