OpenClaw Incomplete Scope Clearing Allows Privilege Escalation

A high-severity vulnerability exists in the OpenClaw npm package, specifically affecting versions 2026.3.28 and earlier. This vulnerability arises from an incomplete fix related to scope clearing within the trusted-proxy authentication mode. The flaw allows attackers to escalate their privileges to operator.admin, potentially gaining unauthorized access to sensitive data or system functionalities. The vulnerability was reported by @north-echo and patched in version 2026.3.31, with the fix committed on March 30, 2026. This issue is critical for organizations utilizing OpenClaw with trusted-proxy authentication, as it could lead to significant security breaches. Defenders should prioritize upgrading to version 2026.3.31 or later to mitigate this risk.

Attack Chain

1. Attacker identifies an OpenClaw instance running a vulnerable version (<=2026.3.28) using trusted-proxy authentication.
2. Attacker gains initial access with limited privileges, potentially via compromised credentials or another vulnerability.
3. Attacker authenticates via the trusted proxy, declaring a set of operator scopes.
4. Due to the incomplete scope clearing, the attacker’s declared operator scopes are not properly sanitized by the system.
5. The system incorrectly grants the attacker elevated privileges associated with the self-declared operator scopes.
6. Attacker exploits the elevated operator.admin privileges to access restricted resources or functionalities.
7. Attacker performs unauthorized actions, such as data modification, configuration changes, or lateral movement within the system.

Impact

Successful exploitation of this vulnerability allows an attacker to escalate their privileges to operator.admin within the OpenClaw environment. This could lead to unauthorized access to sensitive data, modification of critical system configurations, and potential disruption of services. The impact is especially significant for organizations that rely on OpenClaw for critical operations and have not yet upgraded to the patched version. The attacker could leverage the escalated privileges to perform a wide range of malicious activities, potentially compromising the entire system.

Recommendation

• Upgrade OpenClaw to version 2026.3.31 or later to remediate the vulnerability (Affected Packages / Versions).
• Monitor OpenClaw logs for suspicious activity related to trusted-proxy authentication and privilege escalation (logsource: “webserver”, product: “linux”).
• Implement strict access controls and regularly review user permissions to minimize the impact of potential privilege escalation attacks.
• Deploy the Sigma rule provided below to detect potential exploitation attempts targeting this vulnerability.