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 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 products
- Wazuh
- CVSS 3.1
- 4.9 MEDIUM
- EPSS
- 0.4% (35th percentile)
- Weakness
- CWE-770, CWE-789
- NVD status
- Received
- Published
- 2026-08-19
No indexed exploits for CVE-2026-44253 yet
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No exploit for CVE-2026-44253 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.