What’s Vulnerable › Vulnerabilities

CVE-2026-22261: Suricata eve/alert: http1 xff handling can lead to denial of service

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-01-27 · updated 2026-06-17
• Weakness: CWE-1050

Description

Suricata is a network IDS, IPS and NSM engine. Prior to versions 8.0.3 and 7.0.14, various inefficiencies in xff handling, especially for alerts not triggered in a tx, can lead to severe slowdowns. Versions 8.0.3 and 7.0.14 contain a patch. As a workaround, disable XFF support in the eve configuration. The setting is disabled by default.

Affected products

• OISF suricata: before 7.0.14; from 8.0.0 before 8.0.3 — fixed in 7.0.14, 8.0.3

How to fix

Upgrade to a fixed version: OISF suricata 7.0.14, 8.0.3. Check the vendor advisory for mitigations.

References

• https://github.com/OISF/suricata/commit/3f0725b34c7871c2de4346c8af872f10f4501e44
• https://github.com/OISF/suricata/commit/af246ae7ab1b70c09f83c0619b253095ccc18667
• https://github.com/OISF/suricata/security/advisories/GHSA-5jvg-5j3p-34cf
• https://redmine.openinfosecfoundation.org/issues/8156

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