PT-2026-35961 · Wazuh · Wazuh

Marius-Momeu · Published 2026-03-17 · Updated 2026-04-30 · CVE-2026-26204

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/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.

Exploit

Fix

DoS

Integer Underflow

Weakness Enumeration

CWE-124

CWE-191

Related Identifiers

BDU:2026-06589

CVE-2026-26204

Affected Products

Wazuh

References · 7

• 🔥 https://github.com/wazuh/wazuh/security/advisories/GHSA-j4c7-hwjw-8857 · Exploit
• https://bdu.fstec.ru/vul/2026-06589 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-26204 · Security Note
• https://github.com/wazuh/wazuh/releases/tag/v4.14.4 · Note
• https://twitter.com/vuldb/status/2049730791241023563 · Twitter Post
• https://t.me/cveNotify/161656 · Telegram Post
• https://twitter.com/CVEnew/status/2049578382053273809 · Twitter Post