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.

Attack Vector Network

Attack Complexity Low

Privileges Required High

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required High

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation poc

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Wazuh wazuh-manager unaffected
Version Status Constraints
4.4.0 affected < 4.14.7

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Project Subscriptions

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Advisories

No advisories yet.

Fixes

Solution

Upgrade the affected package to 4.14.7 or later.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/wazuh/wazuh/pull/37119 cve-icon cve-icon
https://github.com/wazuh/wazuh/security/advisories/GHSA-mr7j-w2m4-vw5j cve-icon cve-icon cve-icon
https://www.vulncheck.com/advisories/wazuh-dos-via-fdecompress-files-zip-bomb cve-icon cve-icon
History

Tue, 18 Aug 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Tue, 18 Aug 2026 17:45:00 +0000

Type Values Removed Values Added
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.
Title Wazuh 4.4.0 < 4.14.7 DoS via fdecompress_files() Zip Bomb
Weaknesses CWE-409
References
Metrics cvssV3_1

{'score': 4.9, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-08-18T19:27:06.342Z

Reserved: 2026-08-14T14:06:40.513Z

Link: CVE-2026-74046

cve-icon Vulnrichment

Updated: 2026-08-18T19:27:03.113Z

cve-icon NVD

Status : Received

Published: 2026-08-18T18:19:34.053

Modified: 2026-08-18T20:17:29.330

Link: CVE-2026-74046

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-18T18:30:16Z

Weaknesses