Unrated severityOSV Advisory· Published Jan 27, 2026· Updated Jan 27, 2026
Suricata eve/alert: http1 xff handling can lead to denial of service
CVE-2026-22261
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.
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Affected products
3Patches
Vulnerability mechanics
References
4- github.com/OISF/suricata/commit/3f0725b34c7871c2de4346c8af872f10f4501e44mitrex_refsource_MISC
- github.com/OISF/suricata/commit/af246ae7ab1b70c09f83c0619b253095ccc18667mitrex_refsource_MISC
- github.com/OISF/suricata/security/advisories/GHSA-5jvg-5j3p-34cfmitrex_refsource_CONFIRM
- redmine.openinfosecfoundation.org/issues/8156mitrex_refsource_MISC
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