# CVE-2026-41499

## Summary

- **CVE ID:** CVE-2026-41499
- **Severity:** MEDIUM
- **CVSS Score:** 6.5 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** CWE-124, CWE-191
- **Published:** Apr 29, 2026
- **Last Modified:** Apr 29, 2026

## 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.

## Affected Products

- wazuh — wazuh (>= 4.0.0, < 4.14.4)

## References

- [CNA](https://github.com/wazuh/wazuh/security/advisories/GHSA-qvqj-p8mm-r7h3)
- [CNA](https://github.com/wazuh/wazuh/releases/tag/v4.14.4)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.25%
- **EPSS Percentile:** 17.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._