Bug 2454374 (CVE-2026-31934)

Summary: CVE-2026-31934 Suricata: Suricata: Denial of Service via quadratic complexity in URL search of MIME-encoded SMTP messages
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Suricata, a network Intrusion Detection System (IDS), Intrusion Prevention System (IPS), and Network Security Monitoring (NSM) engine. A remote attacker could exploit a quadratic complexity issue when searching for URLs in MIME-encoded messages over SMTP. This could lead to a significant performance impact, potentially causing a Denial of Service (DoS) condition for the affected system.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On: 2454446, 2454455    
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Description OSIDB Bzimport 2026-04-02 15:01:22 UTC
Suricata is a network IDS, IPS and NSM engine. From version 8.0.0 to before version 8.0.4, there is a quadratic complexity issue when searching for URLs in mime encoded messages over SMTP leading to a performance impact. This issue has been patched in version 8.0.4.