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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.007 (53.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 53.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.007 · change: +0.003
Affected products
- Wazuh — versions 5.0.0, >= 5.0.0-beta1, < 5.0.0-beta2, >= 4.0.0, < 4.14.6
Weakness classification (CWE)
References
- github.com/wazuh/wazuh/security/advisories/GHSA-8c6v-7g3w-prrq (Exploit, Vendor Advisory)
- github.com/wazuh/wazuh/pull/35757 (Patch, Issue Tracking)
- github.com/wazuh/wazuh/commit/b29849f8abb08d78f257e6106b6111a8a1b0e621 (Patch)
- github.com/wazuh/wazuh/releases/tag/v4.14.6 (Patch, Release Notes)
- github.com/wazuh/wazuh/releases/tag/v5.0.0-beta2 (Patch, Release Notes)
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.