AIKIDO-2026-31494

TL;DR

The UPnP client factory consumes service controlURL, SCPDURL, and eventSubURL values from a device description without verifying they point to the device's own host, and SSDP discovery location validation relies on substring matching. A rogue or compromised UPnP device on the network can supply crafted or obfuscated URLs that resolve to loopback, unspecified, or IPv4 link-local cloud-metadata addresses. This can steer the client into issuing requests to internal services it should not reach, resulting in server-side request forgery. The fix validates that service URL elements resolve to the device's own host and parses discovery locations with proper URL/IP parsing that rejects obfuscated internal addresses.