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CVE-2026-26206— Wazuh: API brute-force protection bypass via race condition in login attempt tracking

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Wazuh开源的一个应用软件。用于收集，汇总，索引和分析安全数据，帮助组织检测入侵，威胁和行为异常。 Wazuh 4.0.0版本至4.14.4之前版本存在安全漏洞，该漏洞源于暴力破解保护可被绕过，可能导致更多密码猜测。

CVSS 6.5 · Medium EPSS 0.28% · P19

Affected Version Matrix 1

VendorProduct Version RangeStatus
wazuh wazuh >= 4.0.0, < 4.14.4 affected
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I. Basic Information for CVE-2026-26206

Vulnerability Information
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Vulnerability Title
Wazuh: API brute-force protection bypass via race condition in login attempt tracking
Source: CVE Program / CVE List V5
Vulnerability Description
Wazuh is a free and open source platform used for threat prevention, detection, and response. From version 4.0.0 to before version 4.14.4, Wazuh's server API brute-force protection for POST /security/user/authenticate can be bypassed by sending concurrent authentication requests. Although the configured threshold (max_login_attempts, default 50) is enforced correctly for sequential requests, a parallel burst allows significantly more failed login attempts to be processed before the IP block is applied. This enables an attacker to perform more password guesses than the configured policy intends (e.g., 100 attempts processed where 50 should be allowed). This issue has been patched in version 4.14.4.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
过多认证尝试的限制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Wazuh 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Wazuh是Wazuh开源的一个应用软件。用于收集，汇总，索引和分析安全数据，帮助组织检测入侵，威胁和行为异常。 Wazuh 4.0.0版本至4.14.4之前版本存在安全漏洞，该漏洞源于暴力破解保护可被绕过，可能导致更多密码猜测。
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 >= 4.0.0, < 4.14.4 -

II. Public POCs for CVE-2026-26206

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III. Intelligence Information for CVE-2026-26206

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Vendor Advisories for CVE-2026-26206 (1)

Vendor Pages for CVE-2026-26206 (1)

Same Patch Batch · wazuh · 2026-04-29 · 5 CVEs total

CVE-2026-30893 9.0 CRITICAL Wazuh cluster sync path traversal in decompress_files() enables arbitrary file write and c
CVE-2026-41499 6.5 MEDIUM Wazuh: Multiple Heap-based NULL WRITE Buffer Underflows in parse_uname_string()
CVE-2026-28221 6.5 MEDIUM Wazuh: Pre-auth stack-based buffer overflow in wazuh-remoted print_hex_string() due to sig
CVE-2026-26204 4.4 MEDIUM Wazuh: Heap-based NULL WRITE Buffer Underflow in GetAlertData

IV. Related Vulnerabilities

Same product: wazuh
Same vendor: wazuh
Same weakness: CWE-307

V. Comments for CVE-2026-26206

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