CVE-2026-74045 Wazuh 3.12.0 before 4.14.8 Heap Buffer Overflow in wazuh-analysisd FIM Decoder
An enrolled agent can crash the Wazuh manager via a heap buffer overflow in the FIM decoder, causing a fleet-wide detection outage.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-74045?
CVE-2026-74045 is a high-severity memory corruption vulnerability in wazuh-manager, published on 13 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-122
Which versions are affected by CVE-2026-74045?
How do I fix CVE-2026-74045?
No fix has been published for CVE-2026-74045 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-74045 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-74045 exists.
Sources
Also known as GHSA-gc4j-j9fg-4cfr.