CVE-2026-22263

Suricata http1: quadratic complexity in headers parsing over multiple packets

State: Published
Severity: 5.3 Medium
Published: Jan 27, 2026
Updated: Jan 27, 2026
Reserved: Jan 7, 2026

Description

Suricata is a network IDS, IPS and NSM engine. Starting in version 8.0.0 and prior to version 8.0.3, inefficiency in http1 headers parsing can lead to slowdown over multiple packets. Version 8.0.3 patches the issue. No known workarounds are available.

Scores

CVSS	Score	Vector	Source
3.1	5.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L	GitHub_M

Weaknesses

CWE-1050 Excessive Platform Resource Consumption within a Loop

Affected Products

Product	Versions
suricataOISF	>= 8.0.0, < 8.0.3Affected

References

https://github.com/OISF/suricata/security/advisories/GHSA-rwc5-hxj6-hwx7
https://github.com/OISF/suricata/commit/018a377f74e3eb2b042c6f783ad9043060923428
https://redmine.openinfosecfoundation.org/issues/8201

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