Vulnerability · Published Sep 10, 2026 · Assigned by GitHub_M
CVE-2026-45763Suricata lua: sandbox allocation limit not enforced for new allocations
Medium 5.9
In plain English
A medium-severity resource allocation without limits in suricata from OISF. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:13 | suricata | no fix listed | DEBIAN-CVE-2026-45763 |
| Debian:14 | suricata | 1:8.0.5-1 | DEBIAN-CVE-2026-45763 |
| Ubuntu:22.04:LTS | suricata | no fix listed | UBUNTU-CVE-2026-45763 |
| Ubuntu:24.04:LTS | suricata | no fix listed | UBUNTU-CVE-2026-45763 |
| Ubuntu:26.04:LTS | suricata | no fix listed | UBUNTU-CVE-2026-45763 |
| Ubuntu:26.10 | suricata | no fix listed | UBUNTU-CVE-2026-45763 |
Affected products (as reported)
Weakness: CWE-770 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- https://github.com/OISF/suricata/security/advisories/GHSA-9h43-frr8-xx6m x_refsource_CONFIRM
- https://forum.suricata.io/t/suricata-8-0-5-and-7-0-16-released/6315 x_refsource_MISC
- https://redmine.openinfosecfoundation.org/issues/8507 x_refsource_MISC