# CVE-2026-41499

> Vulnerability · severity: **MEDIUM** (CVSS 6.5).

## Description

Wazuh is a free and open source platform used for threat prevention, detection, and response. From version 4.0.0 to before version 4.14.4, multiple heap-based out-of-bounds WRITE vulnerabilities exist in parse_uname_string() (remoted_op.c). This function processes OS identification data from agents and contains a dangerous code pattern that appears in 4 locations within the same function: writing to strlen(ptr) - 1 without checking for empty strings. When the string is empty, strlen() returns 0, and 0 - 1 wraps to SIZE_MAX due to unsigned integer underflow. Due to pointer arithmetic wrapping, SIZE_MAX effectively becomes -1, causing a write exactly 1 byte before the allocated buffer. This corrupts heap metadata (e.g., the chunk size field in glibc malloc), leading to heap corruption. This issue has been patched in version 4.14.4.

## Key facts

- **CVE ID:** CVE-2026-41499
- **Published:** 2026-04-29
- **CVSS severity:** MEDIUM
- **CVSS base score:** 6.5
- **CWE codes:** CWE-124, CWE-191

## Affected products

- `wazuh:wazuh`

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-41499

## Citation

> AI Analytics. CVE-2026-41499. Retrieved 2026-07-19 from https://api.ai-analytics.org/cve/CVE-2026-41499. Derived from NIST NVD. Licensed CC0.

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