---
id: CVE-2026-74045
title: >-
  Wazuh from 3.12.0 before 4.14.8 contains a heap buffer overflow in
  fim_generate_alert() where full_log is sized from input but written bounded by
  OS_MAXSTR
summary: >-
  Wazuh from 3.12.0 before 4.14.8 contains a heap buffer overflow in
  fim_generate_alert() where full_log is sized from input but written bounded by
  OS_MAXSTR. An enrolled agent can send a crafted FIM syscheck event to corrupt
  manager heap …
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H'
cwe:
  - CWE-122
published: '2026-10-13'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T14:17:41.160'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-74045'
references:
  - url: 'https://github.com/wazuh/wazuh/releases/tag/v4.14.8'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/wazuh/wazuh/security/advisories/GHSA-gc4j-j9fg-4cfr'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/wazuh-3.12.0-before-4.14.8-heap-buffer-overflow-in-wazuh-analysisd-fim-decoder
    label: disclosure@vulncheck.com
  - url: 'https://github.com/wazuh/wazuh/security/advisories/GHSA-gc4j-j9fg-4cfr'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
ingestedAt: '2026-10-13T14:29:01.863Z'
---

## Overview

Wazuh from 3.12.0 before 4.14.8 contains a heap buffer overflow in fim_generate_alert() where full_log is sized from input but written bounded by OS_MAXSTR. An enrolled agent can send a crafted FIM syscheck event to corrupt manager heap memory and deterministically crash wazuh-analysisd, causing a fleet-wide detection outage.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.