Wazuh 4.4.0 before 4.14.7 contains a denial of service vulnerability in the fdecompress_files() function within cluster.py that allows authenticated cluster peers to exhaust memory by supplying a malicious synchronization archive without decompressed size limits. Attackers holding a valid cluster Fernet key can upload a small, highly compressed zip bomb archive that forces wazuh-clusterd on the master node to decompress the full payload into memory, causing memory exhaustion and service disruption.

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Advisories

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Fixes

Solution

Upgrade the affected package to 4.14.7 or later.


Workaround

No workaround given by the vendor.

History

Wed, 16 Sep 2026 20:30:00 +0000

Type Values Removed Values Added
First Time appeared Wazuh wazuh
CPEs cpe:2.3:a:wazuh:wazuh:*:*:*:*:*:*:*:*
Vendors & Products Wazuh wazuh

Fri, 21 Aug 2026 21:15:00 +0000

Type Values Removed Values Added
First Time appeared Wazuh
Wazuh wazuh-manager
Vendors & Products Wazuh
Wazuh wazuh-manager

Tue, 18 Aug 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 18 Aug 2026 17:45:00 +0000

Type Values Removed Values Added
Description Wazuh 4.4.0 before 4.14.7 contains a denial of service vulnerability in the fdecompress_files() function within cluster.py that allows authenticated cluster peers to exhaust memory by supplying a malicious synchronization archive without decompressed size limits. Attackers holding a valid cluster Fernet key can upload a small, highly compressed zip bomb archive that forces wazuh-clusterd on the master node to decompress the full payload into memory, causing memory exhaustion and service disruption.
Title Wazuh 4.4.0 < 4.14.7 DoS via fdecompress_files() Zip Bomb
Weaknesses CWE-409
References
Metrics cvssV3_1

{'score': 4.9, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-08-18T19:27:06.342Z

Reserved: 2026-08-14T14:06:40.513Z

Link: CVE-2026-74046

cve-icon Vulnrichment

Updated: 2026-08-18T19:27:03.113Z

cve-icon NVD

Status : Analyzed

Published: 2026-08-18T18:19:34.053

Modified: 2026-09-16T20:24:56.137

Link: CVE-2026-74046

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-21T21:00:03Z

Weaknesses