Inefficiency in HTTP Headers Parsing in Suricata Network Security Engine
CVE-2026-22263

5.3MEDIUM

Key Information:

Vendor

Oisf

Status
Suricata
Vendor
CVE Published:
27 January 2026

What is CVE-2026-22263?

Suricata, a versatile network intrusion detection and prevention system, is affected by a performance issue related to HTTP headers parsing. Versions 8.0.0 through 8.0.2 exhibit inefficiencies that can lead to significant slowdowns when processing multiple packets. This issue has been addressed in version 8.0.3, which mitigates the performance degradation. Users of the affected versions are advised to upgrade to ensure optimal performance and security. Currently, no workarounds are available for this vulnerability.

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Affected Version(s)

suricata >= 8.0.0, < 8.0.3

References

https://github.com/OISF/suricata/security/advisories/GHSA...
x_refsource_CONFIRM
https://github.com/OISF/suricata/commit/018a377f74e3eb2b0...
x_refsource_MISC
https://redmine.openinfosecfoundation.org/issues/8201
x_refsource_MISC

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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