CVE-2026-44256
Wazuh: CRLF Log Injection via Unsanitized Basic-Auth Username
Description
Wazuh is a free and open source platform used for threat prevention, detection, and response. From 4.4.0 until 4.14.6 and 5.0.0-beta2, api/api/middlewares.py decodes the Basic authentication username before credential validation and passes it to the access logger without neutralizing control characters. api/api/alogging.py interpolates that value into the plain-text API log. An unauthenticated attacker can include carriage returns or line feeds in the username to forge entries, obscure activity, or poison systems that consume the plain-text audit log. The JSON log format is not affected because JSON serialization escapes these characters. This issue is fixed in versions 4.14.6 and 5.0.0-beta2.
INFO
Published Date :
Aug. 19, 2026, 5:18 p.m.
Last Modified :
Sept. 18, 2026, 2:52 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | MITRE-CVE |
Solution
- Update Wazuh to version 4.14.6 or later.
- Ensure API logs are properly sanitized for control characters.
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-2026-44256.
| URL | Resource |
|---|---|
| https://github.com/wazuh/wazuh/commit/cddf3fd16b0f945b28eb9c27714de3cc344e0926 | Patch |
| https://github.com/wazuh/wazuh/pull/35866 | Issue Tracking Patch |
| https://github.com/wazuh/wazuh/releases/tag/v4.14.6 | Release Notes |
| https://github.com/wazuh/wazuh/releases/tag/v5.0.0-beta2 | Release Notes |
| https://github.com/wazuh/wazuh/security/advisories/GHSA-c3m6-fp2h-wmr4 | Exploit Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-44256 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-2026-44256
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-2026-44256 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-44256 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]
Sep. 18, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:wazuh:wazuh:5.0.0:beta1:*:*:*:*:*:* *cpe:2.3:a:wazuh:wazuh:*:*:*:*:*:*:*:* versions from (including) 4.4.0 up to (excluding) 4.14.6 Added Reference Type GitHub, Inc.: https://github.com/wazuh/wazuh/commit/cddf3fd16b0f945b28eb9c27714de3cc344e0926 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/wazuh/wazuh/pull/35866 Types: Issue Tracking, Patch Added Reference Type GitHub, Inc.: https://github.com/wazuh/wazuh/releases/tag/v4.14.6 Types: Release Notes Added Reference Type GitHub, Inc.: https://github.com/wazuh/wazuh/releases/tag/v5.0.0-beta2 Types: Release Notes Added Reference Type GitHub, Inc.: https://github.com/wazuh/wazuh/security/advisories/GHSA-c3m6-fp2h-wmr4 Types: Exploit, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 19, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-44256', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-08-19T18:17:23.310124Z'} -
New CVE Received by [email protected]
Aug. 19, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'wazuh', 'product': 'wazuh', 'versions': [{'status': 'affected', 'version': '>= 4.4.0, < 4.14.6'}, {'status': 'affected', 'version': '>= 5.0.0-beta1, < 5.0.0-beta2'}]}] Added Description Wazuh is a free and open source platform used for threat prevention, detection, and response. From 4.4.0 until 4.14.6 and 5.0.0-beta2, api/api/middlewares.py decodes the Basic authentication username before credential validation and passes it to the access logger without neutralizing control characters. api/api/alogging.py interpolates that value into the plain-text API log. An unauthenticated attacker can include carriage returns or line feeds in the username to forge entries, obscure activity, or poison systems that consume the plain-text audit log. The JSON log format is not affected because JSON serialization escapes these characters. This issue is fixed in versions 4.14.6 and 5.0.0-beta2. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N Added CWE CWE-117 Added Reference https://github.com/wazuh/wazuh/commit/cddf3fd16b0f945b28eb9c27714de3cc344e0926 Added Reference https://github.com/wazuh/wazuh/pull/35866 Added Reference https://github.com/wazuh/wazuh/releases/tag/v4.14.6 Added Reference https://github.com/wazuh/wazuh/releases/tag/v5.0.0-beta2 Added Reference https://github.com/wazuh/wazuh/security/advisories/GHSA-c3m6-fp2h-wmr4