Vulnerability · Published Jan 27, 2026 · Assigned by GitHub_M

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

Low 3.7

In plain English

A low-severity security flaw in suricata from OISF. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 31% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)3.7Low

Exploit odds (30 days)0.4%top 68.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:13	suricata	1:7.0.10-1+deb13u3	DEBIAN-CVE-2026-22261
Debian:14	suricata	1:8.0.3-1	DEBIAN-CVE-2026-22261
Ubuntu:22.04:LTS	suricata	no fix listed	UBUNTU-CVE-2026-22261
Ubuntu:24.04:LTS	suricata	no fix listed	UBUNTU-CVE-2026-22261
Ubuntu:25.10	suricata	no fix listed	UBUNTU-CVE-2026-22261

Affected products (as reported)

Vendor	Product	Versions
OISF	suricata	< 7.0.14>= 8.0.0, < 8.0.3

Weakness: CWE-1050 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

References

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