CVE-2026-7084: Toonflow-app SSRF Vulnerability

CVE-2026-7084 Overview

A Server-Side Request Forgery (SSRF) vulnerability has been identified in HBAI-Ltd Toonflow-app versions up to 1.1.1. The vulnerability exists within the fetch function in the file src/routes/setting/vendorConfig/getCodeByLink.ts, specifically in the getCodeByLink endpoint. An authenticated attacker can manipulate the Link argument to perform server-side requests to arbitrary internal or external resources, potentially exposing sensitive internal services or data.

Critical Impact

Authenticated attackers can exploit the SSRF vulnerability to make the server perform arbitrary HTTP requests, potentially accessing internal services, cloud metadata endpoints, or other sensitive resources not intended to be publicly accessible.

Affected Products

• HBAI-Ltd Toonflow-app versions up to 1.1.1
• Systems exposing the /getCodeByLink endpoint

Discovery Timeline

• April 27, 2026 - CVE-2026-7084 published to NVD
• April 29, 2026 - Last updated in NVD database

Technical Details for CVE-2026-7084

Vulnerability Analysis

This vulnerability is classified as Server-Side Request Forgery (CWE-918). The getCodeByLink endpoint accepts a user-controlled Link parameter and uses it within a fetch function without adequate validation. This allows authenticated attackers to forge requests from the server to arbitrary destinations.

The vendor has acknowledged this behavior but maintains that the /getCodeByLink interface is intentionally designed as a high-risk interface for obtaining and executing TypeScript code locally. According to the vendor's response, users are expected to understand and accept the inherent risks before requesting access to this functionality. This creates a disputed status for the vulnerability, as the behavior may be considered "by design" rather than a security flaw.

The attack can be performed remotely over the network by any user with low-level privileges (authentication required). The vulnerability affects confidentiality, integrity, and availability with limited impact in each area.

Root Cause

The root cause is insufficient input validation and sanitization of the Link parameter in the getCodeByLink endpoint. The application's fetch function accepts user-supplied URLs without properly restricting the request destination to trusted domains or blocking internal network addresses. Combined with the endpoint's intended functionality of retrieving and executing external code, this creates a significant security exposure.

Attack Vector

The attack vector is network-based, requiring an authenticated attacker to send a crafted request to the getCodeByLink endpoint with a malicious URL in the Link parameter. The attacker could target:

• Internal network services not exposed to the internet
• Cloud provider metadata endpoints (e.g., http://169.254.169.254/)
• Other microservices within the application infrastructure
• Local file resources via file:// protocol (if supported)

The vulnerability has been publicly disclosed through the GitHub issue tracker, and details are available on VulDB.

Detection Methods for CVE-2026-7084

Indicators of Compromise

• Unusual outbound HTTP/HTTPS requests from the Toonflow-app server to internal IP ranges (10.x.x.x, 172.16.x.x-172.31.x.x, 192.168.x.x)
• Requests to cloud metadata endpoints (169.254.169.254) originating from the application server
• Abnormal traffic patterns on the /getCodeByLink endpoint with external or suspicious URLs in the Link parameter

Detection Strategies

• Implement web application firewall (WAF) rules to detect and block SSRF patterns in request parameters
• Monitor application logs for the getCodeByLink endpoint and flag requests containing internal IP addresses, localhost references, or cloud metadata URLs
• Use network monitoring to detect unexpected outbound connections from the application server to internal network segments

Monitoring Recommendations

• Enable detailed logging for all requests to the /getCodeByLink endpoint, including the full Link parameter value
• Configure alerts for requests attempting to access RFC 1918 private IP ranges or link-local addresses
• Review authentication logs to identify accounts making suspicious requests to the vulnerable endpoint

How to Mitigate CVE-2026-7084

Immediate Actions Required

• Evaluate whether the /getCodeByLink endpoint is necessary for your deployment and disable it if not required
• Restrict access to the endpoint using network segmentation or additional authentication controls
• Implement a URL allowlist to restrict the Link parameter to trusted external domains only
• Review user access to determine who has permissions to use this high-risk interface

Patch Information

No official patch information is currently available. Users should monitor the Toonflow-app GitHub repository for updates. Given the vendor's position that this is an intentional high-risk feature, organizations should implement compensating controls rather than waiting for a fix.

Workarounds

• Disable the /getCodeByLink endpoint entirely if not required for business operations
• Implement server-side URL validation to reject requests targeting internal networks, localhost, or cloud metadata endpoints
• Deploy a reverse proxy or WAF with SSRF protection rules in front of the application
• Limit the endpoint's accessibility to specific trusted IP addresses or VPN connections only

# Example: Block access to getCodeByLink endpoint using nginx
location /getCodeByLink {
    # Restrict to trusted internal network only
    allow 10.0.0.0/8;
    deny all;
    
    # Or disable entirely
    # return 403;
}