Vulnerability · Published Aug 18, 2026 · Assigned by VulnCheck

CVE-2026-74046Wazuh 4.4.0 < 4.14.7 DoS via fdecompress_files() Zip Bomb

Medium 4.9

In plain English

A medium-severity security flaw in wazuh-manager from Wazuh. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 48% of all known vulnerabilities).

Severity (CVSS 3.1)4.9Medium

Exploit odds (30 days)0.6%top 52.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Wazuh	wazuh-manager	4.4.0 – before 4.14.7

Weakness: CWE-409 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

References

GitHub Security Advisory (GHSA-mr7j-w2m4-vw5j) vendor-advisory
Pull Request patch
https://www.vulncheck.com/advisories/wazuh-dos-via-fdecompress-files-zip-bomb third-party-advisory