CVE-2026-71540

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...

CVE-2026-71540

The Wazuh security platform is vulnerable to a memory exhaustion issue in versions 3.9.0 through 4.14.7 . The flaw exists in the wazuh-clusterd component (specifically in framework/wazuh/core/cluster/common.py), where the system allocates a payload buffer based on a 20-byte cluster protocol heade...

CVE-2026-71540 Wazuh Manager cluster header parsing allows pre-authentication memory exhaustion

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...

CVE-2026-71540 Wazuh Manager cluster header parsing allows pre-authentication memory exhaustion

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...

CVE-2026-71540: Allocation of Resources Without Limits or Throttling

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...

Wazuh Server 3.9.0 < 4.14.5 DoS (CVE-2026-44253)

The version of Wazuh Server on the remote host is at least 3.9.0 and prior to 4.14.5. It is, therefore, affected by a denial of service vulnerability: - The cluster protocol allows an authenticated cluster node to exhaust memory on the master. The receivestr method accepts an attacker-controlled...

CVE-2026-44253

Wazuh is a free and open source platform used for threat prevention, detection, and response. From 3.9.0 until 4.14.5 and 5.0.0-beta2, the Wazuh cluster protocol in framework/wazuh/core/cluster/common.py allows an authenticated cluster node to exhaust memory on the master. The receivestr method...

CVE-2026-46343 Wazuh: Arbitrary File Deletion via Cluster Protocol – Incomplete Path Validation in end_receiving_file()

Wazuh is a free and open source platform used for threat prevention, detection, and response. From 4.0.0 until 4.14.6 and 5.0.0-beta2, WazuhCommon.endreceivingfile in framework/wazuh/core/cluster/common.py allows a cluster-authenticated node to delete files outside WAZUHPATH. A syniwme request wi...

CVE-2026-46343 Wazuh: Arbitrary File Deletion via Cluster Protocol – Incomplete Path Validation in end_receiving_file()

Wazuh is a free and open source platform used for threat prevention, detection, and response. From 4.0.0 until 4.14.6 and 5.0.0-beta2, WazuhCommon.endreceivingfile in framework/wazuh/core/cluster/common.py allows a cluster-authenticated node to delete files outside WAZUHPATH. A syniwme request wi...

CVE-2026-44253 Wazuh: Cluster Protocol Memory Exhaustion (DoS) via unbounded receive_str allocation and div_msg_box accumulation

Wazuh is a free and open source platform used for threat prevention, detection, and response. From 3.9.0 until 4.14.5 and 5.0.0-beta2, the Wazuh cluster protocol in framework/wazuh/core/cluster/common.py allows an authenticated cluster node to exhaust memory on the master. The receivestr method...

CVE-2026-44253 Wazuh: Cluster Protocol Memory Exhaustion (DoS) via unbounded receive_str allocation and div_msg_box accumulation

Wazuh is a free and open source platform used for threat prevention, detection, and response. From 3.9.0 until 4.14.5 and 5.0.0-beta2, the Wazuh cluster protocol in framework/wazuh/core/cluster/common.py allows an authenticated cluster node to exhaust memory on the master. The receivestr method...

CVE-2026-44253

CVE-2026-44253 affects the Wazuh cluster protocol in framework/wazuh/core/cluster/common.py, allowing an authenticated cluster node to exhaust memory on the master. The root cause is twofold: the receive_str() method accepts an attacker-controlled total for InBuffer without a maximum, enabling a ...

EUVD-2026-62552

Wazuh is a free and open source platform used for threat prevention, detection, and response. From 3.9.0 until 4.14.5 and 5.0.0-beta2, the Wazuh cluster protocol in framework/wazuh/core/cluster/common.py allows an authenticated cluster node to exhaust memory on the master. The receivestr method...

CVE-2026-44253 Wazuh: Cluster Protocol Memory Exhaustion (DoS) via unbounded receive_str allocation and div_msg_box accumulation

Wazuh is a free and open source platform used for threat prevention, detection, and response. From 3.9.0 until 4.14.5 and 5.0.0-beta2, the Wazuh cluster protocol in framework/wazuh/core/cluster/common.py allows an authenticated cluster node to exhaust memory on the master. The receivestr method...

PT-2026-78505

Wazuh is a free and open source platform used for threat prevention, detection, and response. From 3.9.0 until 4.14.5 and 5.0.0-beta2, the Wazuh cluster protocol in framework/wazuh/core/cluster/common.py allows an authenticated cluster node to exhaust memory on the master. The receive str method...

CVE-2026-44253: Memory Allocation with Excessive Size Value

Wazuh is a free and open source platform used for threat prevention, detection, and response. From 3.9.0 until 4.14.5 and 5.0.0-beta2, the Wazuh cluster protocol in framework/wazuh/core/cluster/common.py allows an authenticated cluster node to exhaust memory on the master. The receivestr method...

CVE-2026-33754

Wazuh is a free and open source platform used for threat prevention, detection, and response. In versions 3.9.0 and above, prior to 4.14.5, a remote attacker can trigger memory exhaustion in the cluster protocol parser by sending a crafted message header with an arbitrarily large payload length...

CVE-2026-33754: Uncontrolled Resource Consumption

Wazuh is a free and open source platform used for threat prevention, detection, and response. In versions 3.9.0 and above, prior to 4.14.5, a remote attacker can trigger memory exhaustion in the cluster protocol parser by sending a crafted message header with an arbitrarily large payload length...

EUVD-2026-45077

Wazuh is a free and open source platform used for threat prevention, detection, and response. In versions 3.9.0 and above, prior to 4.14.5, a remote attacker can trigger memory exhaustion in the cluster protocol parser by sending a crafted message header with an arbitrarily large payload length...

CVE-2026-33754

Wazuh 3.9.0+ is affected by an unauthenticated DoS in the cluster protocol parser caused by a crafted header with an arbitrarily large payload length. The vulnerability arises because the length is trusted before authentication/decryption and used to allocate memory, leading to memory exhaustion ...