A logic error in Wazuh versions before 4.14.8 allows authenticated users to bypass validation and run commands as root on the server.
Key points
- Wazuh 4.14.3 through 4.14.7 are affected by CVE-2026-74041
- The flaw has a CVSS score of 9.4, rated critical
- Users with manager:update_config permissions can exploit the issue
Wazuh released version 4.14.8 to address a critical vulnerability in its manager software. The flaw allows attackers with specific permissions to execute commands with root privileges.
What happened
The National Vulnerability Database lists CVE-2026-74041 as a critical issue in Wazuh versions 4.14.3 through 4.14.7. The problem stems from a mismatch in how the system handles letter casing. The configuration validator and the log collector process text differently regarding uppercase and lowercase characters. This discrepancy bypasses security checks designed to block remote commands. An authenticated user with the manager:update_config permission can exploit this gap. They can inject a command using uppercase text that the validator fails to catch. The log collector then executes this command as root when the system reloads. This allows the user to run commands as root.
Why it matters
- Case-sensitivity errors occur when software components interpret text rules differently. One part may block lowercase letters while another accepts uppercase ones, creating a bypass path.
- Remote command execution flaws are dangerous because they allow attackers to run code on a server from afar. If the code runs as root, the attacker has total control.
- Configuration validation is the first line of defense. When validators fail to catch malicious input, attackers can inject harmful commands that the system will later execute.
- Teams usually rely on layered security. If one layer fails due to a logic error, the entire system becomes vulnerable to privilege escalation attacks.
Why it matters
Security teams should review how their systems handle configuration inputs. Case-sensitivity mismatches are common in open-source tools where different modules are developed separately. Understanding that validators and executors might interpret rules differently helps in spotting similar issues. Regular audits of configuration handling logic can prevent these bypasses. Teams should ensure that all components agree on what constitutes valid input to close these gaps.
The fix
- Upgrade Wazuh manager to version 4.14.8 immediately
- Verify that no unauthorized commands were run during the affected period
- Review logs for any unexpected configuration changes
- Ensure all manager nodes are updated to the patched version
What to do and how to stay safe: Wazuh
- Check your Wazuh manager version and update if it is below 4.14.8
- Monitor system logs for any unusual command execution after configuration updates
- Restrict manager:update_config permissions to only trusted administrators
- Once the vendor provides an update, apply it promptly to all affected systems
Step-by-step guide: Patch Testing: How to Verify Fixes Without Breaking Your Systems
General security guidance from the Crypt Weekly newsroom. It is not confirmed advice from the organisations named in this story.
Frequently asked questions
What is CVE-2026-74041?
It is a critical vulnerability in Wazuh versions 4.14.3 to 4.14.7 that allows remote root command execution via a case-sensitivity mismatch.
Who can exploit this flaw?
Any authenticated user with the manager:update_config permission can inject and execute commands as root.
Is there a fix available?
Yes, upgrading to Wazuh version 4.14.8 resolves the issue.
