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CVE-2026-45761

Suricata detect: case-insensitive frame handling can cause heap buffer overflow during rule load

CVSS 3.1 3.3 LOWCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-45761

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-45761

Published

suricata

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "OISF",
                    "product": "suricata",
                    "versions": [
                        {
                            "version": ">= 8.0.0, < 8.0.5",
                            "status": "affected"
                        },
                        {
                            "version": "< 7.0.16",
                            "status": "affected"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON