Vulnerability Details CVE-2026-45761
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 3.0%
CVSS Severity
CVSS v3 Score 3.3
References
Products affected by CVE-2026-45761
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cpe:2.3:a:oisf:suricata:7.0.0
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cpe:2.3:a:oisf:suricata:7.0.1
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cpe:2.3:a:oisf:suricata:7.0.10
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cpe:2.3:a:oisf:suricata:7.0.11
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cpe:2.3:a:oisf:suricata:7.0.12
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cpe:2.3:a:oisf:suricata:7.0.13
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cpe:2.3:a:oisf:suricata:7.0.14
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cpe:2.3:a:oisf:suricata:7.0.15
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cpe:2.3:a:oisf:suricata:7.0.2
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cpe:2.3:a:oisf:suricata:7.0.3
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cpe:2.3:a:oisf:suricata:7.0.4
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cpe:2.3:a:oisf:suricata:7.0.5
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cpe:2.3:a:oisf:suricata:7.0.6
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cpe:2.3:a:oisf:suricata:7.0.7
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cpe:2.3:a:oisf:suricata:7.0.8
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cpe:2.3:a:oisf:suricata:7.0.9
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cpe:2.3:a:oisf:suricata:8.0.0
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cpe:2.3:a:oisf:suricata:8.0.1
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cpe:2.3:a:oisf:suricata:8.0.2
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cpe:2.3:a:oisf:suricata:8.0.3
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cpe:2.3:a:oisf:suricata:8.0.4