# CVE-2026-45761

## Summary

- **CVE ID:** CVE-2026-45761
- **Severity:** LOW
- **CVSS Score:** 3.3 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L)
- **CWE:** CWE-122
- **Published:** Sep 10, 2026
- **Last Modified:** Sep 10, 2026

## Description

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.

## Affected Products

- OISF — suricata (>= 8.0.0, < 8.0.5)
- OISF — suricata (< 7.0.16)

## References

- [CNA](https://github.com/OISF/suricata/security/advisories/GHSA-r74x-74x5-r9vm)
- [CNA](https://forum.suricata.io/t/suricata-8-0-5-and-7-0-16-released/6315)
- [CNA](https://redmine.openinfosecfoundation.org/issues/8526)

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._