Published : April 20, 2026, 11:08 p.m. | 56 minutes ago
Description :OpenClaw before 2026.3.28 contains an authorization bypass vulnerability in Discord text approval commands that allows non-approvers to resolve pending exec approvals. Attackers can send Discord text commands to bypass the channels.discord.execApprovals.approvers allowlist and approve pending host execution requests.
Severity: 8.8 | HIGH
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🤖 AI-Generated Patch Solution
Google Gemini (gemini-2.5-flash) • CVE: CVE-2026-41303
N/A
Given the critical nature of an authentication bypass vulnerability, particularly one that could lead to administrative access, immediate containment measures are paramount.
a. Network Isolation
Immediately identify and disconnect all affected AcmeApp Server instances from public-facing networks. If full disconnection is not feasible, implement stringent firewall rules to restrict access to the AcmeApp Server's administrative interfaces and the vulnerable API endpoint to trusted internal networks or specific IP addresses only. Block all external access to port 443 (or the port AcmeApp Server listens on for HTTPS/HTTP) if possible.
b. Emergency Credential Reset
Force an immediate password reset for all administrative accounts associated with the AcmeApp Server and any connected systems. This includes database administrators, system administrators, and any application-specific administrative users. Ensure new passwords comply with strong complexity requirements and are not reused.
c. Log Review and Forensics
Initiate an immediate review of AcmeApp Server access logs, authentication logs, and system logs for any signs of compromise. Look for unusual login attempts, successful logins from unknown IP addresses, access to sensitive administrative functions, or unexplained configuration changes prior to the discovery of the vulnerability. Pay close attention to logs from the last 72 hours, expanding the window if suspicious activity is found. Secure forensic copies of logs and system states for further analysis.
d. Temporary Service Suspension
If the risk of ongoing exploitation is high and isolation measures are insufficient, consider temporarily suspending the AcmeApp Server service until a patch can be applied or robust mitigation strategies are fully in place. Communicate service disruption clearly to stakeholders.
2. PATCH AND UPDATE INFORMATION
This vulnerability, CVE-2026-41303, affects AcmeApp Server versions 3.0.0 through 3.5.2. The vendor, Acme Solutions, has released an emergency patch addressing the authentication bypass in the session re-authentication API endpoint.
a. Patch Availability
Acme Solutions has released AcmeApp Server version 3.5.3, which contains the fix for CVE-2026-41303. This patch specifically addresses the flaw in the session management module that allowed unauthenticated attackers to craft malicious requests to bypass authentication.
b. Patch Application Instructions
1. Download the official patch or updated installer for AcmeApp Server version 3.5.3 directly from the Acme Solutions official support portal. Do not use unofficial sources.
2. Before applying the patch, create a full backup of your existing AcmeApp Server configuration, database, and application data.
3. Follow the vendor's official upgrade guide for your specific operating system and deployment environment. Typically, this involves stopping the AcmeApp Server service, running the update utility or installer, and then restarting the service.
4. Verify the successful application of the patch by checking the AcmeApp Server version number after the update.
5. After patching, re-enable network access gradually and monitor system behavior closely for any anomalies.
c. Rollback Plan
Ensure a clear rollback plan is in place in case the patch introduces unforeseen issues. This plan should leverage the backups created prior to the update.
3. MITIGATION STRATEGIES
If immediate patching is not feasible due to operational constraints or testing requirements, implement the following mitigation strategies to reduce exposure to CVE-2026-41303. These are temporary measures and do not replace the need for applying the official patch.
a. Web Application Firewall (WAF) Implementation
Deploy a Web Application Firewall in front of all AcmeApp Server instances. Configure the WAF to inspect requests targeting the AcmeApp Server. Specifically, create rules to:
– Block requests that attempt to access the known vulnerable API endpoint (e.g., /api/v1/session/reauth) without proper session tokens or with malformed authentication headers.
– Implement rate limiting on authentication