Vulnerability Details CVE-2026-33754
Wazuh is a free and open source platform used for threat prevention, detection, and response. In versions 3.9.0 and above, prior to 4.14.5, a remote attacker can trigger memory exhaustion in the cluster protocol parser by sending a crafted message header with an arbitrarily large payload length. The length is trusted before authentication/decryption and used directly to allocate memory, allowing unauthenticated denial of service of the cluster service. This issue has been fixed in version 4.14.5.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 12.5%
CVSS Severity
CVSS v3 Score 6.5
References
Products affected by CVE-2026-33754
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cpe:2.3:a:wazuh:wazuh:3.10.0
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cpe:2.3:a:wazuh:wazuh:3.10.1
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cpe:2.3:a:wazuh:wazuh:3.10.2
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cpe:2.3:a:wazuh:wazuh:3.11.0
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cpe:2.3:a:wazuh:wazuh:3.11.1
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cpe:2.3:a:wazuh:wazuh:3.11.2
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cpe:2.3:a:wazuh:wazuh:3.11.3
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cpe:2.3:a:wazuh:wazuh:3.11.4
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cpe:2.3:a:wazuh:wazuh:3.11.5
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cpe:2.3:a:wazuh:wazuh:3.12.0
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cpe:2.3:a:wazuh:wazuh:3.12.1
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cpe:2.3:a:wazuh:wazuh:3.12.2
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cpe:2.3:a:wazuh:wazuh:3.12.3
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cpe:2.3:a:wazuh:wazuh:3.13.0
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cpe:2.3:a:wazuh:wazuh:3.13.1
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cpe:2.3:a:wazuh:wazuh:3.13.2
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cpe:2.3:a:wazuh:wazuh:3.13.3
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cpe:2.3:a:wazuh:wazuh:3.9.0
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cpe:2.3:a:wazuh:wazuh:3.9.1
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cpe:2.3:a:wazuh:wazuh:3.9.2
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cpe:2.3:a:wazuh:wazuh:3.9.3
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cpe:2.3:a:wazuh:wazuh:3.9.4
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cpe:2.3:a:wazuh:wazuh:3.9.5
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cpe:2.3:a:wazuh:wazuh:4.0.0
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cpe:2.3:a:wazuh:wazuh:4.0.1
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cpe:2.3:a:wazuh:wazuh:4.0.2
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cpe:2.3:a:wazuh:wazuh:4.0.3
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cpe:2.3:a:wazuh:wazuh:4.0.4
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cpe:2.3:a:wazuh:wazuh:4.1.0
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cpe:2.3:a:wazuh:wazuh:4.1.1
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cpe:2.3:a:wazuh:wazuh:4.1.2
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cpe:2.3:a:wazuh:wazuh:4.1.3
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cpe:2.3:a:wazuh:wazuh:4.1.4
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cpe:2.3:a:wazuh:wazuh:4.1.5
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cpe:2.3:a:wazuh:wazuh:4.10.0
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cpe:2.3:a:wazuh:wazuh:4.10.1
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cpe:2.3:a:wazuh:wazuh:4.10.2
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cpe:2.3:a:wazuh:wazuh:4.10.3
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cpe:2.3:a:wazuh:wazuh:4.10.4
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cpe:2.3:a:wazuh:wazuh:4.11.0
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cpe:2.3:a:wazuh:wazuh:4.11.1
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cpe:2.3:a:wazuh:wazuh:4.11.2
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cpe:2.3:a:wazuh:wazuh:4.12.0
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cpe:2.3:a:wazuh:wazuh:4.13.0
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cpe:2.3:a:wazuh:wazuh:4.13.1
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cpe:2.3:a:wazuh:wazuh:4.14.0
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cpe:2.3:a:wazuh:wazuh:4.14.1
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cpe:2.3:a:wazuh:wazuh:4.14.2
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cpe:2.3:a:wazuh:wazuh:4.14.3
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cpe:2.3:a:wazuh:wazuh:4.14.4
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cpe:2.3:a:wazuh:wazuh:4.2.0
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cpe:2.3:a:wazuh:wazuh:4.2.1
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cpe:2.3:a:wazuh:wazuh:4.2.2
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cpe:2.3:a:wazuh:wazuh:4.2.3
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cpe:2.3:a:wazuh:wazuh:4.2.4
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cpe:2.3:a:wazuh:wazuh:4.2.5
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cpe:2.3:a:wazuh:wazuh:4.2.6
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cpe:2.3:a:wazuh:wazuh:4.2.7
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cpe:2.3:a:wazuh:wazuh:4.3.0
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cpe:2.3:a:wazuh:wazuh:4.3.1
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cpe:2.3:a:wazuh:wazuh:4.3.10
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cpe:2.3:a:wazuh:wazuh:4.3.11
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cpe:2.3:a:wazuh:wazuh:4.3.2
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cpe:2.3:a:wazuh:wazuh:4.3.3
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cpe:2.3:a:wazuh:wazuh:4.3.4
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cpe:2.3:a:wazuh:wazuh:4.3.5
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cpe:2.3:a:wazuh:wazuh:4.3.6
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cpe:2.3:a:wazuh:wazuh:4.3.7
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cpe:2.3:a:wazuh:wazuh:4.3.8
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cpe:2.3:a:wazuh:wazuh:4.3.9
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cpe:2.3:a:wazuh:wazuh:4.4.0
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cpe:2.3:a:wazuh:wazuh:4.4.1
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cpe:2.3:a:wazuh:wazuh:4.4.2
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cpe:2.3:a:wazuh:wazuh:4.4.3
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cpe:2.3:a:wazuh:wazuh:4.4.4
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cpe:2.3:a:wazuh:wazuh:4.4.5
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cpe:2.3:a:wazuh:wazuh:4.5.0
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cpe:2.3:a:wazuh:wazuh:4.5.1
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cpe:2.3:a:wazuh:wazuh:4.5.2
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cpe:2.3:a:wazuh:wazuh:4.5.3
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cpe:2.3:a:wazuh:wazuh:4.5.4
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cpe:2.3:a:wazuh:wazuh:4.6.0
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cpe:2.3:a:wazuh:wazuh:4.7.0
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cpe:2.3:a:wazuh:wazuh:4.7.1
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cpe:2.3:a:wazuh:wazuh:4.7.2
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cpe:2.3:a:wazuh:wazuh:4.7.3
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cpe:2.3:a:wazuh:wazuh:4.7.4
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cpe:2.3:a:wazuh:wazuh:4.7.5
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cpe:2.3:a:wazuh:wazuh:4.8.0
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cpe:2.3:a:wazuh:wazuh:4.8.1
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cpe:2.3:a:wazuh:wazuh:4.8.2
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cpe:2.3:a:wazuh:wazuh:4.9.0
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cpe:2.3:a:wazuh:wazuh:4.9.1
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cpe:2.3:a:wazuh:wazuh:4.9.2