Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Wazuh | Wazuh | >= 4.4.0, < 4.14.6 |
Related Weaknesses (CWE)
References
- https://github.com/wazuh/wazuh/commit/cddf3fd16b0f945b28eb9c27714de3cc344e0926Patch
- https://github.com/wazuh/wazuh/pull/35866Issue TrackingPatch
- https://github.com/wazuh/wazuh/releases/tag/v4.14.6Release Notes
- https://github.com/wazuh/wazuh/releases/tag/v5.0.0-beta2Release Notes
- https://github.com/wazuh/wazuh/security/advisories/GHSA-c3m6-fp2h-wmr4ExploitVendor Advisory
FAQ
What is CVE-2026-44256?
CVE-2026-44256 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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 ...
How severe is CVE-2026-44256?
CVE-2026-44256 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-44256?
Check the references section above for vendor advisories and patch information. Affected products include: Wazuh Wazuh.