CVE-2026-44255 Wazuh: Username Enumeration via Timing Side-Channel

Wazuh is a free and open source platform used for threat prevention, detection, and response. From 4.0.0 until 4.14.6 and 5.0.0-beta2, AuthenticationManager.checkuser in framework/wazuh/rbac/orm.py performs checkpasswordhash only when the supplied username exists. A nonexistent username returns...

CVE-2026-44255

Wazuh (open-source threat prevention, detection, and response platform) is vulnerable to username enumeration via a timing side-channel in AuthenticationManager.check_user() within framework/wazuh/rbac/orm.py. The function performs an expensive bcrypt hash check only when the supplied username ex...