Heap Buffer Overflow in Wazuh Affects Manager Capabilities
CVE-2026-74045

7.1HIGH

Key Information:

Vendor

Wazuh

Status
Wazuh-manager
Vendor
CVE Published:
13 October 2026

What is CVE-2026-74045?

Wazuh versions prior to 4.14.8 contain a heap buffer overflow vulnerability in the fim_generate_alert() function. This issue arises when the full_log size is derived from input but is written to memory with a fixed size limit defined by OS_MAXSTR. As a result, an enrolled agent can send a specially crafted File Integrity Monitoring (FIM) syscheck event that may corrupt the heap memory of the manager and cause the wazuh-analysisd component to crash, leading to a disruption in detection capabilities across the fleet.

Affected Version(s)

wazuh-manager 3.12.0 < 4.14.8

wazuh-manager 4.14.8

References

https://github.com/wazuh/wazuh/security/advisories/GHSA-g...
vendor-advisory
https://github.com/wazuh/wazuh/releases/tag/v4.14.8
patchrelease-notes
https://www.vulncheck.com/advisories/wazuh-3.12.0-before-...
third-party-advisory

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
None
Integrity:
Low
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

TarPeg007
vikman90
.