CVE-2026-33754: Wazuh

Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• Wazuh Wazuh: from 3.9.0, before 4.14.5 (fixed in 4.14.5)

Published 2026-07-17. Last modified 2026-07-20.