CVE-2026-44255Wazuh: Username Enumeration via Timing Side-Channel
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No exploitation reported and no EPSS estimate yet.
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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
- 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- Weakness (CWE)
- CWE-208
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Aug 25, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
wazuh wazuh wazuh:wazuh (from the name) | from 4.0.0, < 4.14.6; from 5.0.0-beta1, < 5.0.0-beta2 | CNA record |
wazuh wazuh wazuh:wazuh | from 4.0.0 before 4.14.6; 5.0.0 | NVD |
References
- https://github.com/wazuh/wazuh/security/advisories/GHSA-3978-44q9-9px9x-refsource-confirm, exploit, vendor-advisory
- https://github.com/wazuh/wazuh/pull/35757x-refsource-misc, issue-tracking, patch
- https://github.com/wazuh/wazuh/commit/5ecea7b38b998407cb0d205467dd247140a0f981x-refsource-misc, patch
- https://github.com/wazuh/wazuh/releases/tag/v4.14.6x-refsource-misc, release-notes
- https://github.com/wazuh/wazuh/releases/tag/v5.0.0-beta2x-refsource-misc, release-notes
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.