# CVE-2026-45798

## Summary

- **CVE ID:** CVE-2026-45798
- **Severity:** HIGH
- **CVSS Score:** 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** CWE-121, CWE-170
- **Published:** Aug 19, 2026
- **Last Modified:** Aug 19, 2026

## Description

Wazuh is a free and open source platform used for threat prevention, detection, and response. From 4.5.0 until 4.14.6 and 5.0.0-beta2, compare_wazuh_versions() in src/shared/version_op.c copies the attacker-controlled enrollment V: field into a 10-byte stack buffer with strncpy() but does not explicitly terminate the buffer. The function is reachable before authentication through wazuh-authd on TCP port 1515 when anonymous TLS enrollment is enabled. A version string of at least nine non-null bytes can cause strchr() and strtok() to read beyond ver2 and can make strtok() write a null byte into adjacent stack memory, allowing a remote denial of service. This issue is fixed in versions 4.14.6 and 5.0.0-beta2.

## Affected Products

- wazuh — wazuh (>= 4.5.0, < 4.14.6)
- wazuh — wazuh (>= 5.0.0-beta1, < 5.0.0-beta2)

## References

- [CNA](https://github.com/wazuh/wazuh/security/advisories/GHSA-4fvp-jfc3-qr6r)
- [CNA](https://github.com/wazuh/wazuh/pull/36059)
- [CNA](https://github.com/wazuh/wazuh/commit/b6aac379982d6144b8da38450cbea6c8dc15be44)
- [CNA](https://github.com/wazuh/wazuh/releases/tag/v4.14.6)
- [CNA](https://github.com/wazuh/wazuh/releases/tag/v5.0.0-beta2)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.50%
- **EPSS Percentile:** 40.8

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._