CVE-2026-74046

Wazuh 4.4.0 < 4.14.7 DoS via fdecompress_files() Zip Bomb

Assigner: VulnCheck
Reserved: 14.08.2026 Published: 18.08.2026 Updated: 18.08.2026

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.

Metrics

CVSS 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
CVSS Score: 6.9

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	High
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
CVSS Score: 4.9

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	High	Integrity Impact	None
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	Wazuh
Product	wazuh-manager
Versions	Default: unaffected affected from 4.4.0 to 4.14.7 (excl.)

Vendor

Wazuh

Product

wazuh-manager

Versions

Default: unaffected

affected from 4.4.0 to 4.14.7 (excl.)

Solutions

Upgrade the affected package to 4.14.7 or later.

Credits

moltenbit reporter
jotacarma90 analyst

References

Problem Types

Improper Handling of Highly Compressed Data (Data Amplification) CWE