TI-2026-17871 Aliases CVE-2026-22261

Suricata eve/alert: http1 xff handling can lead to denial of service

LOW 24CWE-1050Published 2026-01-27 · Updated 2026-01-27

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: None · None · Low
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.0037 31st percentileScored 2026-11-07

Fix Fixed suricata (OISF): 7.0.14, 8.0.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
OISF	suricata	before 7.0.14; 8.0.0 to before 8.0.3	7.0.14, 8.0.3	Patch available	CNA

suricata VendorOISF Affected before 7.0.14; 8.0.0 to before 8.0.3 Fixed in 7.0.14, 8.0.3 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:oisf:suricata::::::::	before 7.0.14; 8.0.0 to before 8.0.3	Vulnerable	OISF

cpe:2.3:a:oisf:suricata:*:*:*:*:*:*:*:* Versions before 7.0.14; 8.0.0 to before 8.0.3 Vulnerable ·OISF

Remediation

Fix · CNA suricata (OISF) Fixed in 7.0.14, 8.0.3

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product

Red Hat

Timeline

2026-10-02 Threatist record created from CVE-2026-22261

References

Patch 2

Advisory 1

https://github.com/OISF/suricata/security/advisories/GHSA-5jvg-5j3p-34cf

Other 1

https://redmine.openinfosecfoundation.org/issues/8156

TI-2026-33506 ikev2: unbounded client transform storage can lead to resource exhaustion CVSS 3.1HIGH 7.5
TI-2026-33484 Suricata lua/tls: null dereference in TlsGetCertInfo CVSS 3.1HIGH 7.5
TI-2024-31811 Suricata ja4: invalid alpn leads to panic CVSS 3.1HIGH 7.5
TI-2020-13673 Directory Traversal vulnerability found in Pfsense v.2.1.3 and Pfsense Suricata v.1.4.6… CVSS 3.1HIGH 7.5
TI-2023-17928 In Suricata before 6.0.13, an adversary who controls an external source of Lua rules may… CVSS 3.1CRITICAL 9.8
TI-2026-63304 Use after free in OISF Suricata CVSS 3.1CRITICAL 9.4

See all 99 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences