CVE-2026-45761
Low
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.
SeverityLow
CVSS3.3
Exploit probability—
ProductOisf Suricata
PublishedSep 10, 2026
First seenSep 10, 2026
Weakness typeCWE-122CWE-122
How to fix
Update
- oisf suricata7.0.16, 8.0.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| oisf suricata | 7.0.0 ≤ v < 7.0.16, 8.0.0 ≤ v < 8.0.5 | 7.0.16, 8.0.5 |
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