Medium severity · published Jan 27, 2026
CVE-2026-22261
Suricata eve/alert: http1 xff handling can lead to denial of service
5.3
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 31% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SU
suricata · OISF
< 7.0.14; >= 8.0.0, < 8.0.3 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-22261
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-22261
Patch
https://github.com/OISF/suricata/commit/3f0725b34c7871c2de4346c8af872f10f4501e44
Patch
https://github.com/OISF/suricata/commit/af246ae7ab1b70c09f83c0619b253095ccc18667
Vendor Advisory
https://github.com/OISF/suricata/security/advisories/GHSA-5jvg-5j3p-34cf
Permissions Required
https://redmine.openinfosecfoundation.org/issues/8156
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