CVE-2026-71540 Wazuh - Denial of Service

Wazuh 3.9.0 to 4.14.7 contains a denial of service caused by unvalidated large payload allocation in wazuh-clusterd before Fernet decryption, letting unauthenticated network peers exhaust memory, exploit requires network access.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.35% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
24 September 2026
Updated
15 October 2026
Weakness
CWE-770

Vendor fix

Update to version 4.14.7 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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