CVE-2026-74045: Wazuh 3.12.0 before 4.14.8 Heap Buffer Overflow in wazuh-analysisd FIM Decoder

Severity: high (CVSS 7.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-13 · updated 2026-10-15
Weakness: CWE-122

Description

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.

Affected products

wazuh: from 3.12.0 before 4.14.8 — fixed in 4.14.8

How to fix

Upgrade to a fixed version: wazuh 4.14.8. Check the vendor advisory for mitigations.

References

https://github.com/wazuh/wazuh/releases/tag/v4.14.8
https://github.com/wazuh/wazuh/security/advisories/GHSA-gc4j-j9fg-4cfr
https://www.vulncheck.com/advisories/wazuh-3.12.0-before-4.14.8-heap-buffer-overflow-in-wazuh-analysisd-fim-decoder
https://github.com/wazuh/wazuh/security/advisories/GHSA-gc4j-j9fg-4cfr

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