An insufficient environment variable denylist vulnerability in OpenClaw before version 2026.4.10 allows authenticated attackers to manipulate high-risk startup variables and achieve total system impact.

This flaw involves an incomplete list of disallowed inputs, categorized under CWE-184, where operator-supplied overrides of high-risk interpreter startup variables like VIMINIT, EXINIT, LUA_INIT, and HOSTALIASES are permitted. The attacker authentication level requires low privileges with network access and no user interaction.

A successful exploit could allow malicious actors to influence downstream execution behavior or manipulate network connectivity, leading to total confidentiality, integrity, and availability compromise of the affected component. The CVSS score of 8.8 reflects a high severity level, indicating that authenticated attackers with limited access can leverage this configuration flaw to severely undermine the security posture of the host environment.

Immediate Action: Update the OpenClaw package to version 2026.4.10 or later using the npm package manager.

Proactive Monitoring: Monitor execution environments and access logs for unusual environment variable modifications or unexpected downstream interpreter behaviors.

Compensating Controls: Restrict low-privileged user access to the execution policy configuration interface and implement strict input validation at the application boundary.

Public Exploit Available: No

Given the high CVSS score and the potential for total system compromise, administrators must prioritize updating OpenClaw to version 2026.4.10 immediately. Applying this software update is the most effective method to resolve the insufficient environment variable denylist flaw and secure the execution environment against privilege escalation and policy bypass attempts.