OpenClaw Plugin Trust Verification Bypass via Environment Variable Override

OpenClaw, a yet-to-be-defined application, is susceptible to a plugin trust verification bypass. Prior to version 2026.3.31, the application permits workspace-specific .env files to redefine the OPENCLAW_BUNDLED_PLUGINS_DIR environment variable. This vulnerability enables an attacker who has control over the workspace configuration to inject malicious plugins. By manipulating the directory from which OpenClaw loads bundled plugins, an attacker can circumvent the intended trust mechanisms, leading to the execution of untrusted code within the application’s context. This could lead to code execution, data exfiltration, or other malicious activities, depending on the injected plugin’s capabilities.

Attack Chain

1. Attacker gains access to the OpenClaw workspace configuration files. This could be achieved through compromised credentials or other means of unauthorized access.
2. Attacker creates or modifies a .env file within the workspace.
3. The .env file is populated with a malicious definition of the OPENCLAW_BUNDLED_PLUGINS_DIR variable, pointing to a directory under the attacker’s control.
4. Attacker places a malicious plugin in the directory specified in the modified OPENCLAW_BUNDLED_PLUGINS_DIR.
5. OpenClaw application is launched or reloaded, parsing the .env file and setting the OPENCLAW_BUNDLED_PLUGINS_DIR environment variable accordingly.
6. OpenClaw attempts to load plugins from the directory specified by the attacker-controlled OPENCLAW_BUNDLED_PLUGINS_DIR.
7. The malicious plugin is loaded and executed by OpenClaw, granting the attacker code execution within the application’s environment.
8. The attacker can now perform malicious actions such as data exfiltration or further compromise of the system.

Impact

Successful exploitation of this vulnerability could lead to complete compromise of the OpenClaw application and potentially the underlying system. An attacker could inject malicious plugins to steal sensitive data, modify application behavior, or establish persistence for future attacks. The severity of the impact depends on the permissions granted to the OpenClaw process and the capabilities of the injected plugin. The number of affected users or organizations is currently unknown.

Recommendation

• Upgrade OpenClaw to version 2026.3.31 or later to remediate the vulnerability (CVE-2026-41396).
• Monitor file creation and modification events for .env files within OpenClaw workspaces. Deploy the Sigma rule Detect Suspicious .env File Modification in OpenClaw Workspace to detect malicious modifications.
• Implement strict access controls for OpenClaw workspace configuration files to prevent unauthorized modification.
• Consider restricting the ability of the OpenClaw application to load plugins from arbitrary directories.
• Implement the file integrity monitoring (FIM) of plugin directories.