OpenClaw Role Bypass Vulnerability in device.token.rotate Function

OpenClaw, a yet-to-be-defined software, is vulnerable to a role bypass flaw affecting versions prior to 2026.4.8. This vulnerability, identified as CVE-2026-42422, resides within the device.token.rotate function. Attackers can exploit this weakness to mint tokens associated with roles that have not undergone proper authorization. The core issue lies in the ability to bypass the intended device role-upgrade pairing mechanism, granting unauthorized access to roles and scopes. This circumvention allows malicious actors to either maintain existing roles illegitimately or create new ones without appropriate approval, potentially leading to significant privilege escalation and unauthorized data access within the affected system. Defenders need to ensure they are running at least version 2026.4.8.

Attack Chain

1. Attacker identifies an OpenClaw instance running a version prior to 2026.4.8.
2. Attacker interacts with the device.token.rotate function.
3. The attacker crafts a request to mint a token, specifying an unapproved role.
4. Due to the vulnerability, the system incorrectly validates the request.
5. A token is minted successfully with the unapproved role.
6. The attacker uses the minted token to authenticate to the OpenClaw instance.
7. The attacker now has access to resources and functionalities associated with the unapproved role.
8. The attacker performs actions with elevated privileges, bypassing intended access controls.

Impact

Successful exploitation of CVE-2026-42422 allows attackers to bypass intended authorization mechanisms within OpenClaw. This can lead to significant privilege escalation, potentially granting unauthorized access to sensitive data and critical system functionalities. The impact depends on the specific roles and scopes that can be minted, but it could range from data breaches to complete system compromise. While the exact number of affected systems remains unclear, any OpenClaw deployment prior to version 2026.4.8 is vulnerable.

Recommendation

• Upgrade all OpenClaw installations to version 2026.4.8 or later to remediate CVE-2026-42422.
• Monitor logs for unusual activity related to the device.token.rotate function, particularly requests attempting to mint tokens with unexpected or unapproved roles.
• Deploy the Sigma rule “Detect OpenClaw Token Minting with Unapproved Roles” to detect exploitation attempts targeting CVE-2026-42422.