CVE-2026-71540
highWazuh is an open-source security platform providing unified XDR and SIEM protection for endpoints and cloud workloads.
Wazuh is an open-source security platform providing unified XDR and SIEM protection for endpoints and cloud workloads. From 3.9.0 until 4.14.7, wazuh-clusterd in framework/wazuh/core/cluster/common.py allocates a payload buffer using the size declared in a 20-byte cluster protocol header before Fernet decryption validates the peer. An unauthenticated network peer can declare a payload of up to 256 MiB, stop sending after the header, and retain that allocation until the TCP connection closes. The cluster listener has no application-level per-source connection budget in affected versions, allowing concurrent sockets to multiply memory consumption and potentially terminate the cluster process, disrupt synchronization, and interrupt distributed API forwarding. This issue is fixed in version 4.14.7.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/wazuh/wazuh/commit/9a996bc23d28725f6c1f8f7808355d90e20d3382 security-advisories@github.com
- https://github.com/wazuh/wazuh/pull/37280 security-advisories@github.com
- https://github.com/wazuh/wazuh/releases/tag/v4.14.7 security-advisories@github.com
- https://github.com/wazuh/wazuh/security/advisories/GHSA-78wx-4r6w-w73f security-advisories@github.com
- https://github.com/wazuh/wazuh/security/advisories/GHSA-78wx-4r6w-w73f 134c704f-9b21-4f2e-91b3-4a467353bcc0