CVE-2026-26204 Wazuh: Heap-based NULL WRITE Buffer Underflow in GetAlertData

Wazuh is a free and open source platform used for threat prevention, detection, and response. From version 1.0.0 to before version 4.14.4, a heap-based out-of-bounds WRITE occurs in GetAlertData, resulting in writing a NULL byte exactly 1 byte before the start of the buffer allocated by strdup. D...

CVE-2026-26204

Wazuh is a free and open source platform used for threat prevention, detection, and response. From version 1.0.0 to before version 4.14.4, a heap-based out-of-bounds WRITE occurs in GetAlertData, resulting in writing a NULL byte exactly 1 byte before the start of the buffer allocated by strdup. D...

CVE-2026-26204

Wazuh versions 1.0.0–4.14.3 are affected by a heap-based out-of-bounds write in GetAlertData that writes a NULL byte 1 byte before the start of the buffer allocated by strdup, due to an unsigned underflow. This corrupts heap metadata and can allow a compromised agent to cause denial of service or...

CVE-2026-26204 Wazuh: Heap-based NULL WRITE Buffer Underflow in GetAlertData

Wazuh is a free and open source platform used for threat prevention, detection, and response. From version 1.0.0 to before version 4.14.4, a heap-based out-of-bounds WRITE occurs in GetAlertData, resulting in writing a NULL byte exactly 1 byte before the start of the buffer allocated by strdup. D...

PT-2026-35961

Name of the Vulnerable Software and Affected Versions Wazuh versions 1.0.0 through 4.14.3 Description A heap-based out-of-bounds WRITE occurs in the GetAlertData function. This is caused by an unsigned integer underflow and pointer arithmetic wrapping, which results in a NULL byte being written...