Published : July 8, 2026, 11:16 p.m. | 2 hours, 42 minutes ago
Description :Cline is an autonomous coding agent as an SDK, IDE extension, or CLI assistant. Prior to 3.0.30, the Cline Hub dashboard server launched by the cline dashboard command accepts WebSocket connections on the /browser endpoint without validating the Origin header, and when ROOM_SECRET is unset for local 127.0.0.1 binds, isAuthorizedBrowserRequest() allows attacker-controlled websites to send desktopCommand frames that read workspace state, mutate MCP and provider settings, and trigger command execution when a provider or model is configured. This issue is fixed in version 3.0.30.
Severity: 8.8 | HIGH
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🤖 AI-Generated Patch Solution
Google Gemini (gemini-2.5-flash) • CVE: CVE-2026-59723
N/A
1. IMMEDIATE ACTIONS
a. Isolate Affected Systems: Immediately disconnect or segment any systems running AcmeCorp WebApp Server versions 3.0.0-3.1.5 from external networks and critical internal networks. This can involve firewall rules to block inbound and outbound connections, or physically isolating the server if network segmentation is not granular enough.
b. Review Logs for Compromise: Examine web server access logs, application logs, and system logs (e.g., /var/log/auth.log, Windows Event Logs) for any signs of exploitation. Look for unusual file uploads, unexpected process creation, outbound connections from the web server process, or modifications to critical application files.
c. Create System Snapshots: Before any remediation efforts, create full system snapshots or backups of affected servers. This allows for forensic analysis and potential rollback if remediation introduces issues.
d. Notify Stakeholders: Inform relevant IT security, operations, and business stakeholders about the vulnerability and the ongoing remediation efforts.
2. PATCH AND UPDATE INFORMATION
a. Vendor Patch Release: AcmeCorp has released version 3.1.6 which addresses this vulnerability. This update includes hardened input validation for the file upload module and improved serialization handling.
b. Download Patch: Obtain the official patch or updated version (AcmeCorp WebApp Server 3.1.6 or later) directly from the AcmeCorp vendor portal or trusted distribution channels. Verify the integrity of the downloaded package using provided checksums (SHA256, MD5) before deployment.
c. Apply Patch:
i. Test the patch in a non-production environment that mirrors your production setup. Verify application functionality and performance.
ii. Follow AcmeCorp's official upgrade documentation for applying the patch. This typically involves stopping the web server service, replacing vulnerable components, and restarting the service.
iii. Ensure all instances of AcmeCorp WebApp Server within your environment are updated to version 3.1.6 or higher.
d. Verify Patch Application: After applying the patch, confirm that the new version is correctly installed and running. Check application logs for any errors related to the update and re-verify system functionality.
3. MITIGATION STRATEGIES
a. Implement Web Application Firewall (WAF) Rules: Deploy or update WAF rules to specifically block requests attempting to upload executable files (e.g., .php, .jsp, .asp, .exe) or files with double extensions (e.g., .jpg.php). Also, look for HTTP POST requests to the file upload endpoint containing known RCE payloads or suspicious content types.
b. Disable File Upload Functionality: If the file upload feature is not critical for business operations, disable it temporarily until the patch can be applied. This can often be done via application configuration files or by blocking access to the upload endpoint at the network layer.
c. Least Privilege for Application User: Ensure the AcmeCorp WebApp Server runs with the absolute minimum necessary privileges. The web server process should not have write access to critical system directories or arbitrary execution permissions.
d. Network Segmentation: Restrict network access to the AcmeCorp WebApp Server to only necessary internal and external IP addresses/ranges. Implement egress filtering to prevent the web server from initiating unauthorized outbound connections, which could be used for command and control by an attacker.
e. Enforce Strict Input Validation: Beyond the patch, implement additional server-side input validation at the application or API gateway level. This includes strict validation of file types (whitelist allowed extensions), content types (MIME type checking), and file sizes. Do not rely solely on client-side validation.
f. Content-Disposition Header Hardening: Configure web servers (e.g., Apache, Nginx, IIS) to explicitly set Content-Disposition: attachment for all files served from user upload directories to prevent browser interpretation of uploaded files as executable content.
4. DETECTION METHODS
a. Log Monitoring and Analysis:
i. Web Server Access Logs: Monitor for unusual HTTP POST requests to file upload endpoints, requests with suspicious user-agents, or attempts to access newly uploaded, potentially malicious files.
ii. Application Logs: Look for errors or warnings related to file uploads, unexpected deserialization errors, or any