{"id":"CVE-2026-57227","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-57227","generatedAt":"2026-10-28T06:35:15.970Z","title":"Crafted MQTT traffic can grow transaction state indefinitely, consuming CPU and memory and causing slowdown or denial of service.","description":"Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. From 7.0.0 until 7.0.17 and 8.0.6, the MQTT parser in rust/src/mqtt/mqtt.rs permits repeated PUBREC or PUBREL messages to be appended to one transaction without a limit. Crafted MQTT traffic can grow transaction state indefinitely, consuming CPU and memory and causing slowdown or denial of service. This issue is fixed in versions 8.0.6 and 7.0.17.","published":"2026-09-18T21:17:01.000Z","lastModified":"2026-09-29T12:48:01.000Z","status":"Analyzed","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-400","CWE-770"],"affected":["oisf/suricata"],"epss":{"score":0.007,"percentile":0.52972,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.70%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://github.com/OISF/suricata/commit/03ba8a71d827dd36a0ceb512f45d2f440f260a3a","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/OISF/suricata/commit/5cde93dea38533c9b225128ba9d54955997dc273","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/OISF/suricata/commit/c03666d261256df5a2d1f5800872da8a5addf6a5","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/OISF/suricata/releases/tag/suricata-7.0.17","tags":["Release Notes"],"source":"security-advisories@github.com"},{"url":"https://github.com/OISF/suricata/releases/tag/suricata-8.0.6","tags":["Release Notes"],"source":"security-advisories@github.com"},{"url":"https://github.com/OISF/suricata/security/advisories/GHSA-7h2h-hpj2-9w6p","tags":["Mitigation","Vendor Advisory"],"source":"security-advisories@github.com"},{"url":"https://redmine.openinfosecfoundation.org/issues/8525","tags":["Permissions Required"],"source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-57227","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}