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.
CVE-2026-57227
HIGHPre-NVD 7.57.5—Trending — 3 sources updated this week
EchelonGraph scoreMEDIUM confidence
This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 66% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: epss, secondary
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 7.5
- EG Score
- 7.5(medium)
- EG Risk
- 38(Track)EG Risk 38/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity75% × 45%Exploitation0% × 40%Automatability30% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 34%
- KEV
- Not listed
Published
September 18, 2026
Last Modified
September 18, 2026
Advisory Details (7)
Auto-updated Sep 18, 2026Patch available. Sources: github, github_commit, github_release.
github_release Patch Available
8.0.6
Patch available: OISF/suricata suricata-8.0.6
https://github.com/OISF/suricata/releases/tag/suricata-8.0.6github_release Patch Available
7.0.17
Patch available: OISF/suricata suricata-7.0.17
https://github.com/OISF/suricata/releases/tag/suricata-7.0.17github_commit Patch Available
commit c03666d26125 (OISF/suricata)
Patch available: OISF/suricata suricata-8.0.6 (contains commit c03666d26125)
https://github.com/OISF/suricata/commit/c03666d261256df5a2d1f5800872da8a5addf6a5github_commit Patch Available
commit 5cde93dea385 (OISF/suricata)
Patch available: OISF/suricata suricata-7.0.17 (contains commit 5cde93dea385)
https://github.com/OISF/suricata/commit/5cde93dea38533c9b225128ba9d54955997dc273github_commit
commit 03ba8a71d827 (OISF/suricata)
Fix landed in OISF/suricata commit 03ba8a71d827 — awaiting tagged release
https://github.com/OISF/suricata/commit/03ba8a71d827dd36a0ceb512f45d2f440f260a3agithub Patch Available
mqtt: unbounded resource consumption from repeated pubrec and pubrel messages · Advisory · OISF/suricata · GitHub
https://github.com/OISF/suricata/security/advisories/GHSA-7h2h-hpj2-9w6pWeakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 6× in last 7d / 6× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-09-20 20:17 UTCEG score recompute
- 2026-09-20 20:16 UTCEPSS rescore
- 2026-09-19 20:47 UTCEG score recompute
- 2026-09-18 21:17 UTCEG score recompute
- 2026-09-18 20:25 UTCEG score recompute
- 2026-09-18 20:24 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2026-57227?
CVE-2026-57227 is a high vulnerability published on September 18, 2026. 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…
When was CVE-2026-57227 disclosed?
CVE-2026-57227 was first published in the National Vulnerability Database on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-57227 actively exploited?
CVE-2026-57227 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 66.3% of all scored CVEs.
What is the CVSS score of CVE-2026-57227?
CVE-2026-57227 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-57227?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-57227, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-57227
Is Your Infrastructure Affected by CVE-2026-57227?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.