Vulnerability in Wazuh
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (18.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 18.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- Wazuh — versions >= 4.0.0, < 4.14.4
Weakness classification (CWE)
References
- github.com/wazuh/wazuh/security/advisories/GHSA-m2mr-xhhv-jx58 (Exploit, Vendor Advisory)
- github.com/wazuh/wazuh/releases/tag/v4.14.4 (Release Notes)
Frequently asked questions
- What is CVE-2026-26206?
- CVE-2026-26206 is a medium-severity vulnerability in Wazuh, classified under Improper Restriction of Excessive Authentication Attempts. CVSS score: 6.5/10. Published 2026-04-29.
- How severe is CVE-2026-26206?
- Medium severity. CVSS v3 base score is 6.5 out of 10.