CVE-2026-26206

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.

• CWE-307
• CWE-362
• CWE-367

• https://github.com/wazuh/wazuh/releases/tag/v4.14.4Release Notes
• https://github.com/wazuh/wazuh/security/advisories/GHSA-m2mr-xhhv-jx58Exploit, Vendor Advisory
• https://github.com/wazuh/wazuh/security/advisories/GHSA-m2mr-xhhv-jx58Exploit, Vendor Advisory

Published

Apr 29, 2026

Last Modified

Jun 17, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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