Medium severity · published Aug 18, 2026
CVE-2026-74046
Wazuh 4.4.0 < 4.14.7 DoS via fdecompress_files() Zip Bomb
4.9
CVSS
0.6%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 48% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WA
wazuh-manager · Wazuh
4.4.0 before 4.14.7 · source: vendor
WA
Wazuh · Wazuh
4.4.0 before 4.14.7 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-74046
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-74046
vendor-advisory
https://github.com/wazuh/wazuh/security/advisories/GHSA-mr7j-w2m4-vw5j
patch
https://github.com/wazuh/wazuh/pull/37119
third-party-advisory
https://www.vulncheck.com/advisories/wazuh-dos-via-fdecompress-files-zip-bomb
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