Inefficient Alert Handling in Suricata Network Security Engine
CVE-2026-22261

3.7LOW

Key Information:

Vendor

Oisf

Status
Suricata
Vendor
CVE Published:
27 January 2026

What is CVE-2026-22261?

Suricata, the network Intrusion Detection System (IDS) and Intrusion Prevention System (IPS), has a vulnerability related to the handling of 'xff' (X-Forwarded-For) headers. Prior to versions 8.0.3 and 7.0.14, improper processing of alerts not triggered during a transaction can lead to considerable slowdowns in network performance. To mitigate this issue, users can disable XFF support in the eve configuration, as this setting is disabled by default in newer releases.

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Affected Version(s)

suricata < 7.0.14 < 7.0.14

suricata >= 8.0.0, < 8.0.3 < 8.0.0, 8.0.3

References

https://github.com/OISF/suricata/security/advisories/GHSA...
x_refsource_CONFIRM
https://github.com/OISF/suricata/commit/3f0725b34c7871c2d...
x_refsource_MISC
https://github.com/OISF/suricata/commit/af246ae7ab1b70c09...
x_refsource_MISC

CVSS V3.1

Score:
3.7
Severity:
LOW
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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