Wazuh: Username Enumeration via Timing Side-Channel

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-44255
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-19 17:18:48 UTC
Updated2026-08-19 17:18:48 UTC
DescriptionWazuh 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.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

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

Problem Types: CWE-208 | CWE-208 CWE-208: Observable Timing Discrepancy

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
3.1CNADECLARED5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Wazuh Wazuh affected >= 4.0.0, < 4.14.6 Not specified
CNA Wazuh Wazuh affected >= 5.0.0-beta1, < 5.0.0-beta2 Not specified

References

ReferenceSourceLinkTags
github.com/wazuh/wazuh/commit/5ecea7b38b998407cb0d205467dd247140a0f981 [email protected] github.com
github.com/wazuh/wazuh/releases/tag/v4.14.6 [email protected] github.com
github.com/wazuh/wazuh/pull/35757 [email protected] github.com
github.com/wazuh/wazuh/security/advisories/GHSA-3978-44q9-9px9 [email protected] github.com
github.com/wazuh/wazuh/releases/tag/v5.0.0-beta2 [email protected] github.com
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