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.
Fix
Patch, vendor advisory and mitigation references on NVD 3
- 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://github.com/wazuh/wazuh/security/advisories/GHSA-mr7j-w2m4-vw5j Exploit, Mitigation, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 6.9 · wazuhNVD modified 2026-10-22 22:10
Affected (CPE criteria) 1
cpe:2.3:a:wazuh:wazuh:*:*:*:*:*:*:*:*
References 4
- 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