# 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…

Source: https://junglewise.ai/threats/cve-2026-44253-wazuh-is-a-free-and-open-source-platform-used-for-threat  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-19  
License: CC BY 4.0 with a link back

CVE-2026-44253 · Severity: medium · CVSS 4.9 · Published 2026-08-19

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.

Technologies: [Wazuh](https://junglewise.ai/threats/technologies/wazuh). Vendors: [Wazuh](https://junglewise.ai/threats/vendors/wazuh).

## Quick answers

**Is CVE-2026-44253 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-44253 being exploited in the wild.

**How severe is CVE-2026-44253?** Medium severity, with a CVSS score of 4.9, published 19 August 2026.

**Which products and versions are affected?** Wazuh. The advisory does not name versions.

**Is there a fix for CVE-2026-44253?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2026-44253?** Check whether you run Wazuh. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Wazuh

## Related threats

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