CVE-2026-41371: Openclaw Privilege Escalation Vulnerability

CVE-2026-41371 Overview

CVE-2026-41371 is a privilege escalation vulnerability affecting OpenClaw versions prior to 2026.3.28. The vulnerability exists in the chat.send function, which allows write-scoped gateway callers to trigger admin-only session reset operations. Attackers can exploit improper authorization checks to rotate target sessions, archive prior transcript state, and force new session IDs without requiring admin scope privileges.

Critical Impact
Attackers with basic write permissions can escalate privileges to perform admin-level session management operations, potentially compromising session integrity and user data across the platform.

Affected Products

OpenClaw versions prior to 2026.3.28
OpenClaw for Node.js (all affected versions)
OpenClaw gateway components with write-scope permissions

Discovery Timeline

2026-04-28 - CVE-2026-41371 published to NVD
2026-04-28 - Last updated in NVD database

Technical Details for CVE-2026-41371

Vulnerability Analysis

This vulnerability is classified as CWE-863 (Incorrect Authorization), representing a broken access control flaw in OpenClaw's session management functionality. The chat.send path fails to properly verify that the calling entity possesses admin-level scope before executing session reset operations. This allows any gateway caller with basic write scope to invoke administrative functions that should be restricted to privileged users only.

The impact of this vulnerability is significant from an integrity perspective. Attackers can manipulate session states across the system, forcing session rotations that could disrupt legitimate user sessions. The ability to archive prior transcript states without authorization could also lead to data integrity issues and potential compliance violations.

Root Cause

The root cause of CVE-2026-41371 is improper authorization validation in the chat.send endpoint. The code path responsible for handling session reset commands does not adequately verify that the requesting caller has admin scope privileges before processing the operation. Instead, it only checks for basic write permissions, creating an authorization gap that attackers can exploit.

This type of vulnerability typically occurs when developers implement authorization checks at one layer but fail to enforce them consistently across all code paths that access privileged functionality.

Attack Vector

The attack is network-based and requires low privileges (write scope) with no user interaction needed. An attacker with legitimate write-scope credentials can craft malicious requests to the chat.send endpoint that invoke admin-only session reset operations. The attack flow involves:

Authenticating with valid write-scope gateway credentials
Sending specially crafted requests to the chat.send endpoint
Triggering session reset operations that rotate target sessions
Archiving prior transcript state and forcing new session IDs

Since no exploit code examples are available, refer to the VulnCheck Privilege Escalation Advisory for technical details on the exploitation mechanism.

Detection Methods for CVE-2026-41371

Indicators of Compromise

Unusual session reset operations initiated by non-admin accounts
Elevated volume of chat.send requests with session management parameters from write-scoped callers
Unexpected session ID rotations or transcript archival events in audit logs

Detection Strategies

Monitor API logs for chat.send requests that trigger session reset operations from accounts without admin scope
Implement alerting on session management operations performed by non-administrative users
Review gateway caller activity for patterns indicating privilege escalation attempts

Monitoring Recommendations

Enable detailed audit logging for all session management operations
Set up real-time alerts for any session reset commands initiated by write-scoped accounts
Regularly review access patterns for the chat.send endpoint to identify anomalous behavior

How to Mitigate CVE-2026-41371

Immediate Actions Required

Upgrade OpenClaw to version 2026.3.28 or later immediately
Review audit logs for any unauthorized session reset operations
Temporarily restrict write-scope access to the chat.send endpoint until patching is complete

Patch Information

The vendor has addressed this vulnerability in OpenClaw version 2026.3.28. The fix implements proper authorization checks in the chat.send path to ensure that session reset operations require admin scope privileges. Detailed patch information is available in the GitHub Security Advisory.

Workarounds

Implement network-level access controls to restrict chat.send endpoint access to trusted administrative systems
Deploy a Web Application Firewall (WAF) rule to filter requests containing session reset parameters from non-admin callers
Revoke write-scope permissions from accounts that do not require session management capabilities

bash

# Example: Restricting chat.send access at the application gateway level
# Add to OpenClaw gateway configuration
RESTRICT_CHAT_SEND_RESET=admin_scope_only
SESSION_RESET_ALLOWED_SCOPES=admin
ENFORCE_SCOPE_VALIDATION=true