---
id: CVE-2026-45798
title: >-
  Wazuh is a free and open source platform used for threat prevention,
  detection, and response
summary: >-
  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…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-121
  - CWE-170
vendor: wazuh
product: wazuh
affected:
  - 'wazuh >= 4.5.0, < 4.14.6'
  - wazuh = 5.0.0
patched:
  - wazuh 4.14.6
published: '2026-08-19'
updated: '2026-09-15'
sourceUpdated: '2026-09-15T19:25:59.467'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-45798'
references:
  - url: >-
      https://github.com/wazuh/wazuh/commit/b6aac379982d6144b8da38450cbea6c8dc15be44
    label: security-advisories@github.com
  - url: 'https://github.com/wazuh/wazuh/pull/36059'
    label: security-advisories@github.com
  - url: 'https://github.com/wazuh/wazuh/releases/tag/v4.14.6'
    label: security-advisories@github.com
  - url: 'https://github.com/wazuh/wazuh/releases/tag/v5.0.0-beta2'
    label: security-advisories@github.com
  - url: 'https://github.com/wazuh/wazuh/security/advisories/GHSA-4fvp-jfc3-qr6r'
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.00916
epssPercentile: 0.58449
ingestedAt: '2026-09-09T21:22:45.540Z'
---

## Overview

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

- `wazuh >= 4.5.0, < 4.14.6`
- `wazuh = 5.0.0`

## Remediation

Upgrade past the affected range:

- `wazuh 4.14.6`