CVE-2026-33754

MEDIUM

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

Title source: cna
STIX 2.1

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.

References (1)

Core 1
Core References

Scores

CVSS v3 6.5
EPSS 0.0049
EPSS Percentile 39.2%
Attack Vector ADJACENT_NETWORK
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-400
Status published
Products (2)
wazuh/wazuh 3.9.0 - 4.14.5
wazuh/wazuh >= 3.9.0, < 4.14.5
Published Jul 17, 2026
Tracked Since Jul 17, 2026