CVE-2026-45761: 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…

PriorityP414low3.3CVSS 3.1

AVLACLPRLUINSUCNINAL

EPSS

0.18%

7.1th percentile

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

4 ranges

Vendor	Product	Version range	Fixed in
oisf	suricata	< 7.0.16	7.0.16
oisf	suricata	—	—
oisf	suricata	>= 7.0.0 < 7.0.16	7.0.16
oisf	suricata	>= 8.0.0 < 8.0.5	8.0.5

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