CVE-2026-33578 Overview
CVE-2026-33578 is an authorization bypass vulnerability affecting OpenClaw versions prior to 2026.3.28. The vulnerability exists in the Google Chat and Zalouser extensions where route-level group allowlist policies silently downgrade to open policy. This policy resolution flaw allows attackers to bypass configured sender restrictions and interact with bots despite allowlist restrictions being in place.
Critical Impact
Unauthorized users can bypass sender allowlist restrictions to interact with bots, potentially leading to unauthorized access to bot functionality and sensitive operations.
Affected Products
- OpenClaw versions prior to 2026.3.28
- OpenClaw Google Chat extension
- OpenClaw Zalouser extension
Discovery Timeline
- 2026-03-31 - CVE-2026-33578 published to NVD
- 2026-04-01 - Last updated in NVD database
Technical Details for CVE-2026-33578
Vulnerability Analysis
This vulnerability is classified as CWE-863 (Incorrect Authorization), representing a fundamental flaw in how OpenClaw enforces access control policies for its messaging extensions. The core issue lies in the policy resolution mechanism where route-level group allowlist configurations fail to be properly enforced.
When administrators configure sender allowlists at the route level for Google Chat and Zalouser extensions, the system should enforce these restrictions to limit which users can interact with bots. However, due to the policy resolution flaw, these configured allowlist policies silently degrade to an open policy state, effectively removing all sender restrictions without any warning or indication to administrators.
The attack requires low privileges and can be executed remotely over the network without user interaction, making it accessible to authenticated users who should otherwise be restricted by the allowlist configurations.
Root Cause
The root cause stems from improper handling of group allowlist policy configurations within the Google Chat and Zalouser extensions. When processing route-level policies, the extension fails to maintain the configured allowlist state, instead defaulting to an open policy that permits all senders. This silent policy downgrade occurs without generating any errors or administrative notifications, making the security bypass difficult to detect through normal monitoring.
Attack Vector
The vulnerability is exploitable over the network by authenticated users with low privileges. An attacker who is not included in a configured sender allowlist can still interact with bots by sending requests through the affected extensions. The policy resolution logic incorrectly grants access when it should deny the request based on allowlist rules.
The attack flow involves:
- Administrator configures a sender allowlist to restrict bot interactions
- Attacker (not on the allowlist) sends a request to interact with a bot
- The extension fails to properly resolve the allowlist policy
- The policy silently downgrades to open access
- Attacker successfully interacts with the bot despite restrictions
Detection Methods for CVE-2026-33578
Indicators of Compromise
- Unexpected bot interactions from users not listed in configured allowlists
- Audit logs showing bot commands executed by unauthorized senders
- Policy configuration files showing allowlist settings that don't match observed access patterns
Detection Strategies
- Review bot interaction logs for requests from users who should be restricted by allowlist policies
- Compare configured sender allowlists against actual bot interaction records
- Monitor for policy-related warnings or anomalies in OpenClaw extension logs
- Implement additional logging at the application layer to track policy enforcement decisions
Monitoring Recommendations
- Enable verbose logging for policy resolution in Google Chat and Zalouser extensions
- Set up alerts for bot interactions from users outside configured allowlists
- Regularly audit sender allowlist configurations against actual access patterns
- Monitor for any changes to policy configuration files
How to Mitigate CVE-2026-33578
Immediate Actions Required
- Upgrade OpenClaw to version 2026.3.28 or later immediately
- Review all configured sender allowlists in Google Chat and Zalouser extensions
- Audit bot interaction logs to identify any unauthorized access that may have occurred
- Consider temporarily disabling affected extensions until the patch is applied
Patch Information
The vulnerability has been addressed in OpenClaw version 2026.3.28. The fix is available in commit e64a881ae0fb8af18e451163f4c2d611d60cc8e4. Organizations should update to the patched version as soon as possible. Additional details are available in the GitHub Security Advisory GHSA-63mg-xp9j-jfcm.
Workarounds
- Implement additional access controls at the network layer to restrict bot access
- Deploy application-layer firewalls to enforce sender restrictions independently
- Consider temporarily disabling Google Chat and Zalouser extensions until patching is complete
- Use monitoring to detect and respond to unauthorized bot interactions in real-time
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
