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3.3 Low

CVE-2026-45761 Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine

Description

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to versions 7.0.16 and 8.0.5, a crafted rule using mixed-case frame syntax could trigger a heap buffer overflow while Suricata is loading signatures. The issue is reached during rule parsing/loading rather than by network traffic alone. Versions 7.0.16 and 8.0.5 contain a fix. As a workaround, preprocess rules to check that frames are all lowercase and/or only load trusted rulesets.

Affected products and versions

Product Affected versions Fixed in
suricata 8.0 8.0.0 → < 8.0.5 8.0.5
suricata 7.0 earliest → < 7.0.16 7.0.16

Other CVEs of suricata

The 86 CVEs of suricata →
CVE-2026-94084 Suricata before 8.0.7 has an Http2ThreadMultiBuf use-after-free when a transaction is inspected by rules that use… 9.4 Critical CVE-2026-94083 Suricata before 8.0.7 has a DoH2 type confusion that can cause an invalid free, because cleanup code for the HTTP2 state… 9.4 Critical CVE-2026-71855 Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine 5.9 Medium CVE-2026-71418 Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine 7.5 High
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