Deserialization in Wazuh
CVE-2026-44901
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, AffectedItemsWazuhResult.merge() in framework/wazuh/core/results.py trusts the sort_casting field in a cluster worker's JSON response. During a distributed API merge, attacker-controlled type names are resolved through Python builtins without an allowlist. A compromised worker can set sort_casting to exec and place Python source in affected_items, causing the master to execute the payload as root when responses from multiple nodes are merged. This issue is fixed in versions 4.14.6 and 5.0.0-beta2.
Vulnerability class: Insecure Deserialization
CVSS v3 metric
CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.
Affected products
- Wazuh — versions >= 4.0.0, < 4.14.6, >= 5.0.0-beta1, < 5.0.0-beta2
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-44901?
- CVE-2026-44901 is a high-severity vulnerability in Wazuh, classified under Deserialization of Untrusted Data. CVSS score: 8.4/10. Published 2026-08-19.
- How severe is CVE-2026-44901?
- High severity. CVSS v3 base score is 8.4 out of 10.