Resource exhaustion in Oisf Suricata
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.006 (49.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 49.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Oisf Suricata — versions >= 8.0.0, < 8.0.5
Weakness classification (CWE)
References
- github.com/OISF/suricata/security/advisories/GHSA-9h43-frr8-xx6m (Mitigation, Vendor Advisory)
- redmine.openinfosecfoundation.org/issues/8507 (Permissions Required)
- forum.suricata.io/t/suricata-8-0-5-and-7-0-16-released/6315 (Release Notes, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-45763?
- CVE-2026-45763 is a medium-severity vulnerability in Oisf Suricata, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.9/10. Published 2026-09-10.
- How severe is CVE-2026-45763?
- Medium severity. CVSS v3 base score is 5.9 out of 10.