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CVE-2026-44256— Wazuh: CRLF Log Injection via Unsanitized Basic-Auth Username

Quick assessment

Affected
wazuh wazuh
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Wazuh是美国Wazuh公司开源的一款安全检测与威胁分析平台。 Wazuh 4.4.0版本至4.14.6之前版本和5.0.0-beta1版本至5.0.0-beta2之前版本存在输出处理不当漏洞，该漏洞源于api/api/middlewares.py在凭证验证前解码Basic认证用户名，且未中和控制字符便传递给访问日志，导致未认证攻击者可在用户名中注入回车或换行，伪造日志条目、掩盖活动或毒化消费纯文本审计日志的系统。

CVSS 5.3 · Medium EPSS 0.29% · P21

Possible ATT&CK Techniques 1 AI

T1078.004 · Cloud Accounts

Affected Version Matrix 2

VendorProduct Version RangeStatus
wazuh wazuh >= 4.4.0, < 4.14.6 affected
>= 5.0.0-beta1, < 5.0.0-beta2 affected
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I. Basic Information for CVE-2026-44256

Vulnerability Information
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Vulnerability Title
Wazuh: CRLF Log Injection via Unsanitized Basic-Auth Username
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
日志输出的转义处理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Wazuh 输出处理不当漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Wazuh是美国Wazuh公司开源的一款安全检测与威胁分析平台。 Wazuh 4.4.0版本至4.14.6之前版本和5.0.0-beta1版本至5.0.0-beta2之前版本存在输出处理不当漏洞，该漏洞源于api/api/middlewares.py在凭证验证前解码Basic认证用户名，且未中和控制字符便传递给访问日志，导致未认证攻击者可在用户名中注入回车或换行，伪造日志条目、掩盖活动或毒化消费纯文本审计日志的系统。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
wazuh wazuh >= 4.4.0, < 4.14.6 -

II. Public POCs for CVE-2026-44256

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III. Intelligence Information for CVE-2026-44256

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Patches & Fixes for CVE-2026-44256 (2)

Vendor Advisories for CVE-2026-44256 (1)

Vendor Pages for CVE-2026-44256 (2)

Same Patch Batch · wazuh · 2026-08-19 · 13 CVEs total

CVE-2026-48162 9.1 CRITICAL Wazuh: cluster peer can read arbitrary master files and forge offline REST API administrat
CVE-2026-48024 9.1 CRITICAL Wazuh: merged-file header path traversal in cluster sync allows arbitrary file write under
CVE-2026-49441 9.1 CRITICAL Wazuh : peer-controlled metadata key in process_files_from_worker non-merged branch allows
CVE-2026-44901 8.4 HIGH Wazuh Cluster DAPI Protocol Deserialization of Untrusted Data Remote Code Execution Vulner
CVE-2026-41424 8.2 HIGH Wazuh: Privilege Escalation via Admin-Protection Bypass in update-user API Endpoint
CVE-2026-44252 7.7 HIGH Wazuh Manager dapi RBAC Bypass Allows Privilege Escalation
CVE-2026-46343 7.5 HIGH Wazuh: Arbitrary File Deletion via Cluster Protocol – Incomplete Path Validation in end_re
CVE-2026-45798 7.5 HIGH Wazuh: Pre-auth stack-buffer-overflow in compare_wazuh_versions reachable from wazuh-authd
CVE-2026-44254 5.3 MEDIUM Wazuh: Stack Out-of-Bounds Write in remoted Decompression Path
CVE-2026-44255 5.3 MEDIUM Wazuh: Username Enumeration via Timing Side-Channel
CVE-2026-49392 5.3 MEDIUM Wazuh: Local SQL injection in FIM db due to path lookup interpolation in wazuh-syscheckd
CVE-2026-44253 4.9 MEDIUM Wazuh: Cluster Protocol Memory Exhaustion (DoS) via unbounded receive_str allocation and d

IV. Related Vulnerabilities

Same product: wazuh
Same vendor: wazuh
Same weakness: CWE-117

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