Wazuh: CRLF Log Injection via Unsanitized Basic-Auth Username

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-44256
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-19 17:18:48 UTC
Updated2026-08-19 19:17:16 UTC
DescriptionWazuh 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.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS: 0.002870000 probability, percentile 0.212620000 (date 2026-08-20)

Problem Types: CWE-117 | CWE-117 CWE-117: Improper Output Neutralization for Logs

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
3.1CNADECLARED5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Wazuh Wazuh affected >= 4.4.0, < 4.14.6 Not specified
CNA Wazuh Wazuh affected >= 5.0.0-beta1, < 5.0.0-beta2 Not specified

References

ReferenceSourceLinkTags
github.com/wazuh/wazuh/security/advisories/GHSA-c3m6-fp2h-wmr4 [email protected] github.com
github.com/wazuh/wazuh/commit/cddf3fd16b0f945b28eb9c27714de3cc344e0926 [email protected] github.com
github.com/wazuh/wazuh/releases/tag/v4.14.6 [email protected] github.com
github.com/wazuh/wazuh/pull/35866 [email protected] github.com
github.com/wazuh/wazuh/releases/tag/v5.0.0-beta2 [email protected] github.com
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