CVE-2026-74046
Wazuh 4.4.0 < 4.14.7 DoS via fdecompress_files() Zip Bomb
- State
- Published
- Severity
- 6.9 Medium
- Published
- Aug 18, 2026
- Updated
- Oct 1, 2026
- Reserved
- Aug 14, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | 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 | VulnCheck |
| 3.1 | 4.9 Medium | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H | VulnCheck |
Weaknesses
- CWE-409 Improper Handling of Highly Compressed Data (Data Amplification)
Affected Products
| Product | Versions |
|---|---|
wazuh-managerWazuh |
|
References
- GitHub Security Advisory (GHSA-mr7j-w2m4-vw5j)vendor-advisory
- Pull Requestpatch
- https://www.vulncheck.com/advisories/wazuh-dos-via-fdecompress-files-zip-bombthird-party-advisory
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