CVE-2026-47719

An unauthenticated attacker (Alice) connects to FUXA's Socket.IO endpoint and emits a device-webapi-request event whose property.address field names an arbitrary URL. FUXA's DEVICE_WEBAPI_REQUEST handler at server/runtime/index.js:296 calls axios.get(address) server-side and broadcasts the full response body back on the same event via io.emit. The companion handler DEVICE_PROPERTY at server/runtime/index.js:153 has the same miss against OPC UA and ODBC endpoints. Both handlers skip the isSocketWriteAuthorized() check that the other write-capable events (DEVICE_VALUES at line 182, DEVICE_ENABLE at line 358) call. Alice reads cloud instance metadata, scans internal services, and connects to any OPC UA server or ODBC database the FUXA host can reach, then receives the results.

Details

Vulnerable handlers: server/runtime/index.js:153-171, 296-316:

socket.on(Events.IoEventTypes.DEVICE_PROPERTY, (message) => {
    try {
        if (message && message.endpoint && message.type) {
            devices.getSupportedProperty(message.endpoint, message.type).then(result => {
                message.result = result;
                io.emit(Events.IoEventTypes.DEVICE_PROPERTY, message);
            })
            // ...
        }
    }
    // ...
});

socket.on(Events.IoEventTypes.DEVICE_WEBAPI_REQUEST, (message) => {
    try {
        if (message && message.property) {
            devices.getRequestResult(message.property).then(result => {
                message.result = result;
                io.emit(Events.IoEventTypes.DEVICE_WEBAPI_REQUEST, message);
            })
            // ...
        }
    }
    // ...
});

Sink: server/runtime/devices/httprequest/index.js:471 for the webapi path:

if (property.method === 'GET') {
    axios.get(property.address).then(res => {
        resolve(res.data);
    // ...

Alice fully controls property.address, and io.emit echoes the response body back on the same event. For the ODBC variant, server/runtime/devices/odbc/index.js builds the connection string from endpoint.address plus endpoint.uid and endpoint.pwd, so Alice supplies credentials and targets any reachable ODBC server.

Contrast: server/runtime/index.js:182 (the DEVICE_VALUES write handler) gates the exact same kind of action behind isSocketWriteAuthorized(socket). The two handlers above skip that check.

Reachability: neither handler performs any authorization check, so both modes reach the sinks. secureEnabled=true does not close the gap because the Socket.IO connect block at server/runtime/index.js:114-120 auto-issues a guest token to any client that connects without one, and the handlers run regardless of socket.isAuthenticated. This is the same pattern GHSA-vwcg-c828-9822's note warned about: enabling authentication does not mitigate the missing check here.

Alice uses FUXA as a read-SSRF oracle against any HTTP(S) service the FUXA host can reach, with the response body delivered back to her Socket.IO session. On cloud-hosted SCADA deployments this exfiltrates IAM credentials from the instance metadata service. On OT networks it reaches internal OPC UA servers, ODBC databases, and administrative consoles that have no other external exposure. The ODBC variant accepts attacker-supplied credentials, so Alice authenticates to any ODBC server that trusts connections from the FUXA host. The attack works against secureEnabled=true deployments as well as the default; no operator interaction required.

CVSS 3.1: AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N (High, 8.2). CWE-918.

Untrusted input controls the target URL of a server-initiated request, which may reach internal services not otherwise accessible from outside. Typical impact: access to internal metadata services, internal APIs, or cloud credentials.

CVE-2026-47719 has a CVSS score of 8.2 (High). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. No fixed version is listed yet, so configuration controls and monitoring matter more in the interim.

Kodem intelligence

Add the existing isSocketWriteAuthorized(socket) check at the top of both handlers, matching the pattern used by DEVICE_VALUES and DEVICE_ENABLE. Also switch io.emit to socket.emit so the response scopes to the requesting socket instead of broadcasting to every connected client. For defense in depth, validate property.address against an allowlist of schemes and reject private, loopback, and link-local address ranges before calling axios.get or the device connect paths.

socket.on(Events.IoEventTypes.DEVICE_WEBAPI_REQUEST, (message) => {
    try {
        if (!isSocketWriteAuthorized(socket)) {
            logger.warn(`${Events.IoEventTypes.DEVICE_WEBAPI_REQUEST}: unauthorized request from ${socket.userId || 'guest'}`);
            return;
        }
        if (message && message.property) {
            // ... validate property.address against allowlist ...
            devices.getRequestResult(message.property).then(result => {
                message.result = result;
                socket.emit(Events.IoEventTypes.DEVICE_WEBAPI_REQUEST, message);
            })
            // ...
        }
    }
    // ...
});

Apply the same three changes (auth check, socket.emit, address validation) to DEVICE_PROPERTY.

A fix is available at https://github.com/frangoteam/FUXA/releases/tag/v1.3.2.

Found by aisafe.io

1. What is CVE-2026-47719? CVE-2026-47719 is a high-severity server-side request forgery (SSRF) vulnerability in fuxa-server (npm), affecting versions <= 1.1.14-1243. No fixed version is listed yet. Untrusted input controls the target URL of a server-initiated request, which may reach internal services not otherwise accessible from outside.
2. How severe is CVE-2026-47719? CVE-2026-47719 has a CVSS score of 8.2 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
3. Which versions of fuxa-server are affected by CVE-2026-47719? fuxa-server (npm) versions <= 1.1.14-1243 is affected.
4. Is there a fix for CVE-2026-47719? No fixed version is listed for CVE-2026-47719 yet. Monitor the advisory for updates and apply mitigations in the interim.
5. Is CVE-2026-47719 exploitable, and should I be worried? Whether CVE-2026-47719 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
6. What actually determines whether CVE-2026-47719 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
7. How do I fix CVE-2026-47719? No fixed version is listed yet. In the interim: Validate and restrict destination URLs against an allowlist. Block requests to private IP ranges and cloud metadata endpoints.