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Vulnerabilities CVE-2026-33754

CVE-2026-33754

Medium
Open
TLP:CLEAR

Wazuh: Unauthenticated cluster packet length leads to uncontrolled memory allocation (remote DoS)

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Description

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.

Details

CVSS Score
6.5
EPSS Score
0.49%

39.3th percentile

CVSS Vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Confidence
90%
Published
Jul 16, 2026
Last Modified
Jul 17, 2026
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