{"id":"CVE-2026-95844","state":"PUBLISHED","title":"Moquette deeply nested MQTT topics can cause stack exhaustion","description":"Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, Moquette does not limit the depth of topic names and topic filters before processing them through recursive CTrie insertion and matching operations. A remote client can publish or subscribe with a deeply nested topic, causing a StackOverflowError that disrupts session processing and can deny service to broker clients. This issue is fixed in version 0.18.1.","publishedAt":"2026-09-23T16:29:49.416Z","updatedAt":"2026-09-29T02:02:45.779Z","severity":{"score":8.7,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA: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/ca17e0be19e86d5e291f4532dfdc94616c8e0049","https://github.com/moquette-io/moquette/releases/tag/v0.18.1"],"weaknesses":["CWE-674"],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/95xxx/CVE-2026-95844.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-95844","state":"PUBLISHED","datePublished":"2026-09-23T16:29:49.416Z","dateUpdated":"2026-09-29T02:02:45.779Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-09-22T16:39:45.793Z"},"containers":{"cna":{"title":"Moquette deeply nested MQTT topics can cause stack exhaustion","descriptions":[{"lang":"en","value":"Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, Moquette does not limit the depth of topic names and topic filters before processing them through recursive CTrie insertion and matching operations. A remote client can publish or subscribe with a deeply nested topic, causing a StackOverflowError that disrupts session processing and can deny service to broker clients. 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/ca17e0be19e86d5e291f4532dfdc94616c8e0049","name":"https://github.com/moquette-io/moquette/commit/ca17e0be19e86d5e291f4532dfdc94616c8e0049","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":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.7,"baseSeverity":"HIGH","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-674","lang":"en","description":"CWE-674: Uncontrolled Recursion","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-23T16:29:49.416Z"},"source":{"advisory":"GHSA-446h-6w49-5x92","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":"2026-09-29T02:02:23.767947Z","id":"CVE-2026-95844","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-29T02:02:45.779Z"}}]}}}