CVE-2026-74046 Wazuh 4.4.0 < 4.14.7 DoS via fdecompress_files() Zip Bomb
Authenticated cluster peers can cause memory exhaustion and service disruption on Wazuh master nodes by uploading malicious zip bomb archives.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-74046?
CVE-2026-74046 is a medium-severity denial of service vulnerability in Wazuh Wazuh, published on 18 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.
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.
Weakness: CWE-409
Which versions are affected by CVE-2026-74046?
It affects 1 product.
Products include Wazuh Wazuh.
How do I fix CVE-2026-74046?
No fix has been published for CVE-2026-74046 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-74046 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-74046 exists.
Other vulnerabilities in Wazuh Wazuh
- CVE-2025-24016 Wazuh Server Deserialization of Untrusted Data
- CVE-2024-32038 Wazuh Analysis Engine Event Decoder Heap-based Buffer Overflow Remote Code Execution Vulnerability
- CVE-2021-44079 Command injection in n/a
- CVE-2024-1243 Remote code execution and local privilege escalation in Wazuh Windows agent via NetNTLMv2 hash theft
- CVE-2026-61800 Wazuh cluster worker file sync allows arbitrary file write under /var/ossec (incomplete fix for CVE-2026-30893)
Sources
Also known as GHSA-mr7j-w2m4-vw5j.