CVE-2026-44251 Integer overflow in wazuh
An integer underflow in Wazuh allows a malicious agent to crash the manager, causing denial of service and potentially enabling heap memory corruption.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-44251?
CVE-2026-44251 is a medium-severity vulnerability in Wazuh Wazuh, published on 17 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Wazuh is a free and open source platform used for threat prevention, detection, and response. In versions 3.0.0 and above, prior to 4.14.5, a size_t integer underflow in os_crypto/shared/msgs.c:389 allows any enrolled Wazuh agent to crash the wazuh-remoted process on the manager, immediately disconnecting all agents from the manager. A second code path reached by the same underflow may allow heap memory corruption. This issue has been fixed in version 4.14.5.
Which versions are affected by CVE-2026-44251?
It affects 1 product.
Products include Wazuh Wazuh.
How do I fix CVE-2026-44251?
No fix has been published for CVE-2026-44251 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-44251 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-44251 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-jv5r-5p7c-g9fq.