CVEvulnerability

CVE-2026-44253

4.9 MEDIUM Published 2026-08-19 Modified 2026-10-27 Official page ↗
Status
Analyzed
Published
2026-08-19
Last modified
2026-10-27
Assigner
[email protected]
CVSS 3.1 ([email protected])
4.9 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-770, CWE-789

Description

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 accepts an attacker-controlled total for InBuffer without a maximum, so a new_str command can request a multi-gigabyte bytearray and repeated requests accumulate in in_str. The divided-message path also retains flag_divided fragments under unique counters in div_msg_box without a count, aggregate-size, or expiration limit. Exploitation can disrupt agent connectivity and alert processing across the monitored environment. This issue is fixed in versions 4.14.5 and 5.0.0-beta2.

Affected configurations

• wazuh wazuh (>= 3.9.0 < 4.14.5) • wazuh wazuh 5.0.0

Related

Weakness · CWE (2)

  • CWE-770 Allocation of Resources Without Limits or Throttling weakness
  • CWE-789 Memory Allocation with Excessive Size Value weakness

References