CVE-2026-74046

Published: Aug 18, 2026Modified: Sep 8, 2026

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XShow less

Source: disclosure@vulncheck.com (Secondary)

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.

Related CWEs

CWE-409

Improper Handling of Highly Compressed Data (Data Amplification)

The product does not handle or incorrectly handles a compressed input with a very high compression ratio that produces a large output.

References (4)

https://github.com/wazuh/wazuh/pull/37119

Source: disclosure@vulncheck.com

https://github.com/wazuh/wazuh/security/advisories/GHSA-mr7j-w2m4-vw5j

Source: disclosure@vulncheck.com

https://www.vulncheck.com/advisories/wazuh-dos-via-fdecompress-files-zip-bomb

Source: disclosure@vulncheck.com

https://github.com/wazuh/wazuh/security/advisories/GHSA-mr7j-w2m4-vw5j

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Timeline

No history available yet.