PT-2026-35961 · Wazuh · Wazuh

Marius-Momeu · Published 2026-04-29 · Updated 2026-04-29 · CVE-2026-26204

Positive Technologies (AI Summary)

CVSS v3.1

4.4

Medium

AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

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 exactly 1 byte before the start of the buffer allocated by strdup, thereby corrupting heap metadata. A malicious actor with a compromised agent can exploit this by injecting a specially crafted alert into the alerts log file monitored by wazuh-logcollector to cause heap corruption or denial of service.

Recommendations Update to version 4.14.4.

Fix

Integer Underflow

Weakness Enumeration

CWE-191

CWE-124

Related Identifiers

CVE-2026-26204

Affected Products

Wazuh

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-26204 · Security Note
• https://github.com/wazuh/wazuh/releases/tag/v4.14.4 · Note
• https://github.com/wazuh/wazuh/security/advisories/GHSA-j4c7-hwjw-8857 · Note
• https://twitter.com/CVEnew/status/2049578382053273809 · Twitter Post