# CVE-2026-26204

> Vulnerability · severity: **MEDIUM** (CVSS 4.4).

## Description

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. Due to unsigned integer underflow and pointer arithmetic wrapping, the write lands at offset -1 from the buffer, corrupting heap metadata. A malicious actor can potentially leverage this issue through a compromised agent to cause denial of service or heap corruption by injecting a specially crafted alert into the alerts log file monitored by wazuh-logcollector. This issue has been patched in version 4.14.4.

## Key facts

- **CVE ID:** CVE-2026-26204
- **Published:** 2026-04-29
- **CVSS severity:** MEDIUM
- **CVSS base score:** 4.4
- **CWE codes:** CWE-124, CWE-191

## Affected products

- `wazuh:wazuh`

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-26204

## Citation

> AI Analytics. CVE-2026-26204. Retrieved 2026-08-10 from https://api.ai-analytics.org/cve/CVE-2026-26204. Derived from NIST NVD. Licensed CC0.

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