Answer in brief
CVE-2026-44255 records a Medium severity (CVSS 5.3) vulnerability in Wazuh: Username Enumeration via Timing Side-Channel. The current sources do not mark it as known exploited. The current feed maps wazuh/wazuh (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps wazuh/wazuh (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:a:wazuh:wazuh:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:wazuh:wazuh:5.0.0:beta1:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| wazuh/wazuhgeneric | >=4.0.0 <4.14.6 || >=5.0.0-beta1 <5.0.0-beta2 | 4.14.6, 5.0.0-beta2 |
Published upstream
Aug 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 18, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 19, 2026
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.
Quoted source text, attributed separately from HOL analysis.