Vulnerability Details CVE-2026-45763
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Starting in version 8.0.0 and prior to version 8.0.5, when Lua rule execution is enabled, the Lua sandbox memory limit was not consistently enforced for new allocations. Certain Lua allocation patterns could exceed `security.lua.max-bytes` without triggering the intended memory limit, making the configured sandbox limit unreliable. This requires Lua rules to be enabled and an affected Lua script/rule to be loaded. Version 8.0.5 contains a fix. As a workaround, disable `security.lua.allow-rules` unless Lua rules are required.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.006
EPSS Ranking 47.8%
CVSS Severity
CVSS v3 Score 5.9
References
Products affected by CVE-2026-45763
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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