CVE-2026-44255

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

5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS

0.6% chance of exploitation in the next 30 days; higher than 49% of CVEs (scores of 2026-10-25)

CWE

CWE-208

Published

2026-08-19

Modified

2026-10-26

Record from

the NVD, synced 2026-10-26

Affected

• wazuh:wazuh

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

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