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.
Metrics
Affected Vendors & Products
References
History
Mon, 28 Sep 2026 15:30:00 +0000
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ssvc
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Fri, 25 Sep 2026 08:30:00 +0000
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Wazuh
Wazuh wazuh |
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Wazuh
Wazuh wazuh |
Thu, 24 Sep 2026 18:00:00 +0000
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| Description | 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. | |
| Title | Wazuh Manager cluster header parsing allows pre-authentication memory exhaustion | |
| Weaknesses | CWE-770 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-09-24T17:49:29.865Z
Updated: 2026-09-28T15:02:02.851Z
Reserved: 2026-08-06T21:24:15.375Z
Link: CVE-2026-71540
Updated: 2026-09-28T15:01:30.622Z
Status : Awaiting Analysis
Published: 2026-09-24T18:18:31.340
Modified: 2026-09-30T19:38:27.293
Link: CVE-2026-71540
No data.