---
id: CVE-2026-74046
title: >-
  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…
summary: >-
  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…
severity: medium
cvss: 4.9
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-409
vendor: wazuh
product: wazuh
affected:
  - 'wazuh >= 4.4.0, < 4.14.7'
patched:
  - wazuh 4.14.7
published: '2026-08-18'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T20:24:56.137'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-74046'
references:
  - url: 'https://github.com/wazuh/wazuh/pull/37119'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/wazuh/wazuh/security/advisories/GHSA-mr7j-w2m4-vw5j'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/wazuh-dos-via-fdecompress-files-zip-bomb
    label: disclosure@vulncheck.com
  - url: 'https://github.com/wazuh/wazuh/security/advisories/GHSA-mr7j-w2m4-vw5j'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
epss: 0.00581
epssPercentile: 0.45448
ingestedAt: '2026-09-08T21:11:12.282Z'
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-08-18T19:26:44.382567Z'
---

## Overview

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.

## Affected

- `wazuh >= 4.4.0, < 4.14.7`

## Remediation

Upgrade past the affected range:

- `wazuh 4.14.7`