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5.3
MEDIUM CVSS 3.1
CVE-2026-22261
Suricata eve/alert: http1 xff handling can lead to denial of service
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.

INFO

Published Date :

Jan. 27, 2026, 7:16 p.m.

Last Modified :

Jan. 29, 2026, 9:02 p.m.

Remotely Exploit :

Yes !

Source :

[email protected]
Affected Products

The following products are affected by CVE-2026-22261 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Oisf suricata
: Total Affected Vendor : 1 | Products : 1
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 LOW [email protected]
CVSS 3.1 MEDIUM [email protected]
Solution
Update Suricata to patch inefficiencies in XFF handling that cause slowdowns.
  • Update Suricata to version 8.0.3 or 7.0.14.
  • Disable XFF support in Eve configuration if updating is not possible.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-22261.

URL Resource
https://github.com/OISF/suricata/commit/3f0725b34c7871c2de4346c8af872f10f4501e44 Patch
https://github.com/OISF/suricata/commit/af246ae7ab1b70c09f83c0619b253095ccc18667 Patch
https://github.com/OISF/suricata/security/advisories/GHSA-5jvg-5j3p-34cf Vendor Advisory
https://redmine.openinfosecfoundation.org/issues/8156 Permissions Required
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-22261 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-22261 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-22261 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-22261 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Initial Analysis by [email protected]

    Jan. 29, 2026

    Action Type Old Value New Value
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
    Added CWE NVD-CWE-noinfo
    Added CPE Configuration OR *cpe:2.3:a:oisf:suricata:*:*:*:*:*:*:*:* versions up to (excluding) 7.0.14 *cpe:2.3:a:oisf:suricata:*:*:*:*:*:*:*:* versions from (including) 8.0.0 up to (excluding) 8.0.3
    Added Reference Type GitHub, Inc.: https://github.com/OISF/suricata/commit/3f0725b34c7871c2de4346c8af872f10f4501e44 Types: Patch
    Added Reference Type GitHub, Inc.: https://github.com/OISF/suricata/commit/af246ae7ab1b70c09f83c0619b253095ccc18667 Types: Patch
    Added Reference Type GitHub, Inc.: https://github.com/OISF/suricata/security/advisories/GHSA-5jvg-5j3p-34cf Types: Vendor Advisory
    Added Reference Type GitHub, Inc.: https://redmine.openinfosecfoundation.org/issues/8156 Types: Permissions Required
  • New CVE Received by [email protected]

    Jan. 27, 2026

    Action Type Old Value New Value
    Added 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.
    Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
    Added CWE CWE-1050
    Added Reference https://github.com/OISF/suricata/commit/3f0725b34c7871c2de4346c8af872f10f4501e44
    Added Reference https://github.com/OISF/suricata/commit/af246ae7ab1b70c09f83c0619b253095ccc18667
    Added Reference https://github.com/OISF/suricata/security/advisories/GHSA-5jvg-5j3p-34cf
    Added Reference https://redmine.openinfosecfoundation.org/issues/8156
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 5.3
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact