Language: Java
Label: safe
CWE: CWE-918 \u2014 Server-Side Request Forgery (SSRF)
The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

Code:
        private boolean isUniqueLocalAddress(InetAddress address) {
            // ULA is actually defined as fc00::/7 (so both fc00::/8 and fd00::/8). However, only the latter is actually
            // defined right now, so let's be conservative.
            return address instanceof Inet6Address && (address.getAddress()[0] & 0xff) == 0xfd;
        }