{"id":"CVE-2026-57227","title":"Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine","summary":"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 …","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-400","CWE-770"],"vendor":"OISF","product":"suricata","affected":["suricata >= 8.0.0, < 8.0.6","suricata >= 7.0.0, < 7.0.17"],"published":"2026-09-18","updated":"2026-09-23","sourceUpdated":"2026-09-23T18:25:00.707","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-57227","references":[{"url":"https://github.com/OISF/suricata/commit/03ba8a71d827dd36a0ceb512f45d2f440f260a3a","label":"security-advisories@github.com"},{"url":"https://github.com/OISF/suricata/commit/5cde93dea38533c9b225128ba9d54955997dc273","label":"security-advisories@github.com"},{"url":"https://github.com/OISF/suricata/commit/c03666d261256df5a2d1f5800872da8a5addf6a5","label":"security-advisories@github.com"},{"url":"https://github.com/OISF/suricata/releases/tag/suricata-7.0.17","label":"security-advisories@github.com"},{"url":"https://github.com/OISF/suricata/releases/tag/suricata-8.0.6","label":"security-advisories@github.com"},{"url":"https://github.com/OISF/suricata/security/advisories/GHSA-7h2h-hpj2-9w6p","label":"security-advisories@github.com"},{"url":"https://redmine.openinfosecfoundation.org/issues/8525","label":"security-advisories@github.com"}],"tags":["nvd","cve.org"],"epss":0.007,"epssPercentile":0.51072,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-09-22T15:47:25.096325Z"},"ingestedAt":"2026-09-18T20:51:25.798Z","slug":"CVE-2026-57227","body":"## Overview\n\nSuricata 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}