CVE-2026-74046CWE-409

CVE-2026-74046

Medium · published August 18, 2026

CVSS v3.1
4.9
EPSS
1%
Percentile
47.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.9 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
6.9 · 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
EPSS
0.00581 · 47.0th percentile
Weakness
CWE-409 · Improper Handling of Highly Compressed Data (Data Amplification)
Published
2026-08-18T22:19Z
Affected products (1)
ProductVersionsFixed in
wazuh/wazuh≥ 4.4.0, < 4.14.74.14.7
References (4)
https://github.com/wazuh/wazuh/pull/37119 · [email protected]https://github.com/wazuh/wazuh/security/advisories/GHSA-mr7j-w2m4-vw5j · [email protected]https://www.vulncheck.com/advisories/wazuh-dos-via-fdecompress-files-zip-bomb · [email protected]https://github.com/wazuh/wazuh/security/advisories/GHSA-mr7j-w2m4-vw5j · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 18 AUG 17:27Z
    Wazuh 4.4.0 < 4.14.7 DoS via fdecompress_files() Zip Bomb
    cvelistv5