CVE-2026-40089: Sonicverse Dashboard SSRF Vulnerability

CVE-2026-40089 Overview

CVE-2026-40089 is a Server-Side Request Forgery (SSRF) vulnerability affecting the Sonicverse Radio Audio Streaming Stack dashboard. Sonicverse is a self-hosted Docker Compose stack for live radio streaming, and this vulnerability exists in its API client located at apps/dashboard/lib/api.ts. The flaw allows an authenticated operator to make arbitrary HTTP requests from the dashboard backend to internal or external systems.

Installations created using the provided install.sh script—including deployments using the one-liner bash installation command—are affected. In these deployments, the dashboard accepts user-controlled URLs and passes them directly to a server-side HTTP client without sufficient validation, enabling attackers to pivot through the server to reach otherwise inaccessible network resources.

Critical Impact

Authenticated operators can abuse this SSRF vulnerability to make arbitrary HTTP requests from the dashboard backend, potentially accessing internal services, cloud metadata endpoints, or other sensitive network resources.

Affected Products

• Sonicverse Radio Audio Streaming Stack (versions prior to commit cb1ddbacafcb441549fe87d3eeabdb6a085325e4)
• Installations using the install.sh script
• Deployments via the one-liner bash installation method

Discovery Timeline

• 2026-04-09 - CVE-2026-40089 published to NVD
• 2026-04-09 - Last updated in NVD database

Technical Details for CVE-2026-40089

Vulnerability Analysis

This SSRF vulnerability arises from insufficient validation of user-controlled URLs in the Sonicverse dashboard's API client. The vulnerability exists in apps/dashboard/lib/api.ts, where the application accepts URLs provided by authenticated operators and forwards them to a server-side HTTP client without proper sanitization or allowlist validation.

The network-accessible attack vector with low complexity requirements makes this vulnerability particularly dangerous in environments where the dashboard has access to internal network resources. An attacker with authenticated operator access can leverage the dashboard server as a proxy to reach internal services that would otherwise be inaccessible from external networks.

Root Cause

The root cause is improper input validation (CWE-918: Server-Side Request Forgery) in the API client implementation. The vulnerable code accepts user-supplied URLs and makes HTTP requests on behalf of the user without validating the target destination against an allowlist or blocking requests to sensitive internal resources such as:

• Internal network IP ranges (RFC 1918 addresses)
• Cloud provider metadata endpoints (e.g., 169.254.169.254)
• Localhost services and loopback addresses
• Internal DNS names

Attack Vector

An authenticated operator with access to the Sonicverse dashboard can exploit this vulnerability by submitting crafted URLs through the affected API endpoint. The server-side HTTP client then makes requests to the attacker-specified destination, returning the response to the attacker. This enables:

• Scanning and enumeration of internal network services
• Accessing cloud metadata services to retrieve credentials
• Bypassing network segmentation and firewall rules
• Exfiltrating data from internal services
• Potential lateral movement within the network

The vulnerability requires authentication as an operator, meaning the attacker must first obtain valid credentials or compromise an operator account. However, once authenticated, exploitation is straightforward and requires no special conditions.

Detection Methods for CVE-2026-40089

Indicators of Compromise

• Unusual outbound HTTP requests from the dashboard server to internal IP ranges
• Access attempts to cloud metadata endpoints (e.g., 169.254.169.254) from the dashboard
• Requests to localhost or loopback addresses originating from the dashboard backend
• Unexpected network traffic patterns from the dashboard container to internal services

Detection Strategies

• Monitor dashboard server outbound connections for requests to internal network ranges
• Implement network segmentation alerts for cross-zone traffic from the dashboard
• Enable verbose logging in the dashboard API to capture all outbound request URLs
• Deploy web application firewall (WAF) rules to detect SSRF patterns in request parameters

Monitoring Recommendations

• Configure network monitoring to alert on connections from the dashboard to sensitive internal services
• Review dashboard access logs for suspicious URL patterns in API requests
• Implement anomaly detection for unusual request volumes or destinations from the dashboard backend
• Monitor for authentication events followed by suspicious outbound connection patterns

How to Mitigate CVE-2026-40089

Immediate Actions Required

• Update to commit cb1ddbacafcb441549fe87d3eeabdb6a085325e4 or later immediately
• Review dashboard access logs for evidence of exploitation
• Audit operator accounts and remove unnecessary access privileges
• Implement network segmentation to limit dashboard backend access to internal resources

Patch Information

The vulnerability has been fixed in commit cb1ddbacafcb441549fe87d3eeabdb6a085325e4. Organizations running affected versions should update to this commit or any subsequent release that includes this fix. For detailed patch information, see the GitHub Security Advisory.

Workarounds

• Restrict network access from the dashboard container to only necessary external services
• Implement egress filtering to block requests to internal IP ranges from the dashboard
• Deploy a reverse proxy with URL validation in front of the dashboard API
• Limit operator account access to trusted personnel only until patching is complete
• Consider temporarily disabling the affected API functionality if operationally feasible