CVE-2026-22263: Suricata http1: quadratic complexity in headers parsing over multiple packets
Published Jan 27, 2026
·Updated
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.
Affected Software
2 affected components
Suricata Suricata>=8.0.0<8.0.3
OISF Suricata>=8.0.0<8.0.3
Remediation
Event History
Jan 27, 2026
CVE Published
via MITRE·06:27 PM
Data Sourced
via MITRE·06:27 PM
DescriptionSeverityWeakness
Data Sourced
via NVD·07:16 PM
RemedyDescriptionSeverityWeaknessAffected Software
Jul 15, 58060
Event
via FIRST·12:26 AM
Frequently Asked Questions
1
What is the severity of CVE-2026-22263?
CVE-2026-22263 has a moderate severity level due to its potential for causing slowdown in network operations.
2
How do I fix CVE-2026-22263?
To fix CVE-2026-22263, upgrade Suricata to version 8.0.3 or later.
3
What versions of Suricata are affected by CVE-2026-22263?
CVE-2026-22263 affects Suricata versions 8.0.0 to 8.0.2.
4
What type of vulnerability is CVE-2026-22263?
CVE-2026-22263 is a vulnerability related to inefficient header parsing in HTTP over multiple packets.
5
Who is the vendor for CVE-2026-22263?
The vendor for CVE-2026-22263 is OISF, which develops Suricata.