CVE-2026-40346

NocoBase's workflow HTTP request plugin and custom request action plugin make server-side HTTP requests to user-provided URLs without any SSRF protection. An authenticated user can access internal network services, cloud metadata endpoints, and localhost.

Vulnerable Code

1. Workflow HTTP Request Plugin

packages/plugins/@nocobase/plugin-workflow-request/src/server/RequestInstruction.ts lines 117-128:

return axios.request({
  url: trim(url),  // User-controlled, no validation
  method,
  headers,
  params,
  timeout,
  ...(method.toLowerCase() !== 'get' && data != null
    ? { data: transformer ? await transformer(data) : data }
    : {}),
});

The url at line 98 comes directly from user workflow configuration with only whitespace trimming.

2. Custom Request Action Plugin

packages/plugins/@nocobase/plugin-action-custom-request/src/server/actions/send.ts lines 172-198:

const axiosRequestConfig = {
  baseURL: ctx.origin,
  ...options,
  url: getParsedValue(url, variables),  // User-controlled via template
  headers: { ... },
  params: getParsedValue(arrayToObject(params), variables),
  data: getParsedValue(toJSON(data), variables),
};
const res = await axios(axiosRequestConfig);  // No IP validation

Missing Protections

• No request-filtering-agent or SSRF library (confirmed via grep across entire codebase)
• No private IP range filtering
• No cloud metadata endpoint blocking
• No URL scheme validation
• No DNS rebinding protection

Attack Scenario

1. Authenticated user creates a workflow with HTTP Request node
2. Sets URL to http://169.254.169.254/latest/meta-data/iam/security-credentials/
3. Triggers the workflow
4. Server fetches AWS metadata and returns IAM credentials in workflow execution logs

Alternatively via Custom Request action:

1. Create custom request with URL http://127.0.0.1:5432 or http://10.0.0.1:8080/admin
2. Execute the action
3. Server makes request to internal service

• Cloud metadata theft: AWS/GCP/Azure credentials via metadata endpoints
• Internal network access: Scan and interact with services on private IP ranges
• Database access: Connect to localhost databases (PostgreSQL, Redis, etc.)
• Authentication required: Yes (authenticated user), but any workspace member can create workflows

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-2026-40346 has a CVSS score of 6.5 (Medium). The vector is network-reachable, low 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. A fixed version is available (2.0.37); upgrading removes the vulnerable code path.

Kodem intelligence

1. What is CVE-2026-40346? CVE-2026-40346 is a medium-severity server-side request forgery (SSRF) vulnerability in @nocobase/plugin-workflow-request (npm), affecting versions < 2.0.37. It is fixed in 2.0.37. 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-2026-40346? CVE-2026-40346 has a CVSS score of 6.5 (Medium). 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 @nocobase/plugin-workflow-request are affected by CVE-2026-40346? @nocobase/plugin-workflow-request (npm) versions < 2.0.37 is affected.
4. Is there a fix for CVE-2026-40346? Yes. CVE-2026-40346 is fixed in 2.0.37. Upgrade to this version or later.
5. Is CVE-2026-40346 exploitable, and should I be worried? Whether CVE-2026-40346 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-2026-40346 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-2026-40346? Upgrade @nocobase/plugin-workflow-request to 2.0.37 or later.