CVE-2026-45770 Suricata - Sandbox Bypass & Denial of Service

Suricata >= 8.0.0 and < 8.0.5 contains a sandbox bypass and denial of service caused by excessive flow variable registration in Lua rules, letting attackers bypass Lua sandbox or crash Suricata, exploit requires loading a crafted Lua script/rule.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.48% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Sandbox Bypass
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Published
10 September 2026
Updated
15 October 2026
Weakness
CWE-693

Vendor fix

Upgrade to version 8.0.5 or later; disable security.lua.allow-rules if Lua rules are not required.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

← All CVEs