CVE-2026-33754

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

State: Published
Severity: 6.5 Medium
Published: Jul 16, 2026
Updated: Jul 17, 2026
Reserved: Mar 23, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	GitHub_M

Weaknesses

CWE-400 Uncontrolled Resource Consumption

Affected Products

Product	Versions
wazuhwazuh	>= 3.9.0, < 4.14.5Affected

References

https://github.com/wazuh/wazuh/security/advisories/GHSA-476v-28pp-5wg9

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