CVE-2026-44255
An unauthenticated remote attacker can compare authentication response times to enumerate valid Wazuh usernames and use that information in subsequent credential attacks.
Does this matter?
Lower severity and a low EPSS score (0.44%). Track it; it rarely justifies an emergency change on its own.
Description
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.check_user() in framework/wazuh/rbac/orm.py performs check_password_hash() only when the supplied username exists. A nonexistent username returns immediately, while a valid username causes an expensive bcrypt calculation. An unauthenticated remote attacker can compare authentication response times to enumerate valid Wazuh usernames and use that information in subsequent credential attacks. This issue is fixed in versions 4.14.6 and 5.0.0-beta2.
- CVSS 3.1
- 5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- EPSS
- 0.44% probability · 37th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-208
- Source
- security-advisories@github.com
References
- https://github.com/wazuh/wazuh/commit/5ecea7b38b998407cb0d205467dd247140a0f981
- https://github.com/wazuh/wazuh/pull/35757
- https://github.com/wazuh/wazuh/releases/tag/v4.14.6
- https://github.com/wazuh/wazuh/releases/tag/v5.0.0-beta2
- https://github.com/wazuh/wazuh/security/advisories/GHSA-3978-44q9-9px9
- https://github.com/wazuh/wazuh/security/advisories/GHSA-3978-44q9-9px9
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.