ZDI-26-527: Wazuh Cluster DAPI Protocol Deserialization of Untrusted Data Remote Code Execution Vulnerability
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Wazuh. An attacker must first obtain the ability to execute low-privileged code on a worker node in order to exploit this vulnerability. The ZDI has assigned a CVSS rating of 9.9. The following CVEs are assigned: CVE-2026-44901.
AI Analysis
Technical Summary
CVE-2026-44901 is a critical remote code execution vulnerability in Wazuh's Cluster DAPI protocol. The flaw arises from improper validation of user-supplied data in the sort_casting field, leading to deserialization of untrusted data. An attacker with low-privileged code execution on a worker node can exploit this to execute arbitrary code as root on the master node. The vulnerability has a CVSS score of 9.9, indicating high severity. Wazuh has issued an update to fix this vulnerability.
Potential Impact
An attacker who has gained low-privileged code execution on a worker node can leverage this vulnerability to execute arbitrary code with root privileges on the master node. This can lead to full compromise of the Wazuh cluster environment.
Mitigation Recommendations
Wazuh has released an update that corrects this vulnerability. Users should apply the official patch from Wazuh as soon as possible to remediate this issue.
ZDI-26-527: Wazuh Cluster DAPI Protocol Deserialization of Untrusted Data Remote Code Execution Vulnerability
Description
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Wazuh. An attacker must first obtain the ability to execute low-privileged code on a worker node in order to exploit this vulnerability. The ZDI has assigned a CVSS rating of 9.9. The following CVEs are assigned: CVE-2026-44901.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-44901 is a critical remote code execution vulnerability in Wazuh's Cluster DAPI protocol. The flaw arises from improper validation of user-supplied data in the sort_casting field, leading to deserialization of untrusted data. An attacker with low-privileged code execution on a worker node can exploit this to execute arbitrary code as root on the master node. The vulnerability has a CVSS score of 9.9, indicating high severity. Wazuh has issued an update to fix this vulnerability.
Potential Impact
An attacker who has gained low-privileged code execution on a worker node can leverage this vulnerability to execute arbitrary code with root privileges on the master node. This can lead to full compromise of the Wazuh cluster environment.
Mitigation Recommendations
Wazuh has released an update that corrects this vulnerability. Users should apply the official patch from Wazuh as soon as possible to remediate this issue.
Technical Details
- Classification
- {"confidence":0.95,"severitySource":"cvss-text","classifier":"rss-v2"}
- Article Source
- {"url":"http://www.zerodayinitiative.com/advisories/ZDI-26-527/","fetched":true,"fetchedAt":"2026-08-12T20:04:34.522Z","wordCount":208}
Threat ID: 6a7cd31fbf8831d539148b55
Added to database: 08/12/2026, 20:10:07 UTC
Last enriched: 08/12/2026, 20:13:51 UTC
Last updated: 08/12/2026, 22:57:41 UTC
Views: 3
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