CVE-2026-74046

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.

CVSS v3 4.9 MEDIUM

4.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/wazuh/wazuh/pull/37119	Issue Tracking Patch
https://github.com/wazuh/wazuh/security/advisories/GHSA-mr7j-w2m4-vw5j	Exploit Mitigation Vendor Advisory
https://www.vulncheck.com/advisories/wazuh-dos-via-fdecompress-files-zip-bomb	Third Party Advisory
https://github.com/wazuh/wazuh/security/advisories/GHSA-mr7j-w2m4-vw5j	Exploit Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:wazuh:wazuh:*:*:*:*:*:*:*:*

History

16 Sep 2026, 20:24

Type	Values Removed	Values Added
First Time		Wazuh Wazuh wazuh
References	~~() https://github.com/wazuh/wazuh/pull/37119 -~~	() https://github.com/wazuh/wazuh/pull/37119 - Issue Tracking, Patch
References	~~() https://github.com/wazuh/wazuh/security/advisories/GHSA-mr7j-w2m4-vw5j -~~	() https://github.com/wazuh/wazuh/security/advisories/GHSA-mr7j-w2m4-vw5j - Exploit, Mitigation, Vendor Advisory
References	~~() https://www.vulncheck.com/advisories/wazuh-dos-via-fdecompress-files-zip-bomb -~~	() https://www.vulncheck.com/advisories/wazuh-dos-via-fdecompress-files-zip-bomb - Third Party Advisory
CPE		cpe:2.3:a:wazuh:wazuh::::::::

Information

Published : 2026-08-18 18:19

Updated : 2026-09-16 20:24

NVD link : CVE-2026-74046

Mitre link : CVE-2026-74046

CVE.ORG link : CVE-2026-74046

JSON object : View

Products Affected

wazuh

wazuh

CWE

CWE-409

Improper Handling of Highly Compressed Data (Data Amplification)

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