CVE-2026-74046: Improper Handling of Highly Compressed Data (Data Amplification) in Wazuh wazuh-manager
Wazuh wazuh-manager versions from 4.4.0 up to but not including 4.14.7 contain a denial of service vulnerability in the fdecompress_files() function of cluster.py. Authenticated cluster peers with a valid Fernet key can supply a malicious, highly compressed archive (zip bomb) without decompressed size limits, causing the master node's wazuh-clusterd process to exhaust memory and disrupt service.
AI Analysis
Technical Summary
CVE-2026-74046 is a denial of service vulnerability in Wazuh wazuh-manager affecting versions >=4.4.0 and <4.14.7. The flaw exists in the fdecompress_files() function within cluster.py, where authenticated cluster peers can upload a malicious synchronization archive that is highly compressed without limits on decompressed size. This allows an attacker holding a valid cluster Fernet key to cause memory exhaustion on the master node by forcing full decompression of a zip bomb payload, leading to service disruption of wazuh-clusterd.
Potential Impact
An attacker with authenticated cluster access and a valid Fernet key can cause memory exhaustion on the master node by uploading a maliciously crafted synchronization archive. This results in denial of service due to resource exhaustion and disruption of the wazuh-clusterd service.
Mitigation Recommendations
A fix is available in Wazuh versions 4.14.7 and later. Users should upgrade to version 4.14.7 or newer to remediate this vulnerability. Until then, restrict cluster peer access to trusted entities only.
CVE-2026-74046: Improper Handling of Highly Compressed Data (Data Amplification) in Wazuh wazuh-manager
Description
Wazuh wazuh-manager versions from 4.4.0 up to but not including 4.14.7 contain a denial of service vulnerability in the fdecompress_files() function of cluster.py. Authenticated cluster peers with a valid Fernet key can supply a malicious, highly compressed archive (zip bomb) without decompressed size limits, causing the master node's wazuh-clusterd process to exhaust memory and disrupt service.
CVSS v4.0
Score 6.9medium
Affected software
Wazuh
wazuh-manager
pkg:github/wazuh-managerRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-74046 is a denial of service vulnerability in Wazuh wazuh-manager affecting versions >=4.4.0 and <4.14.7. The flaw exists in the fdecompress_files() function within cluster.py, where authenticated cluster peers can upload a malicious synchronization archive that is highly compressed without limits on decompressed size. This allows an attacker holding a valid cluster Fernet key to cause memory exhaustion on the master node by forcing full decompression of a zip bomb payload, leading to service disruption of wazuh-clusterd.
Potential Impact
An attacker with authenticated cluster access and a valid Fernet key can cause memory exhaustion on the master node by uploading a maliciously crafted synchronization archive. This results in denial of service due to resource exhaustion and disruption of the wazuh-clusterd service.
Mitigation Recommendations
A fix is available in Wazuh versions 4.14.7 and later. Users should upgrade to version 4.14.7 or newer to remediate this vulnerability. Until then, restrict cluster peer access to trusted entities only.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-08-14T14:06:40.513Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a849b61c6e8be03328d7587
Added to database: 08/18/2026, 17:50:25 UTC
Last enriched: 10/02/2026, 15:51:46 UTC
Last updated: 10/02/2026, 15:51:46 UTC
Views: 86
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