n8n/packages/@n8n/eslint-plugin-community-nodes/docs/rules/no-credential-reuse.md

Prevent credential re-use security issues by ensuring nodes only reference credentials from the same package (@n8n/community-nodes/no-credential-reuse)

💼 This rule is enabled in the following configs: ✅ recommended, ☑️ recommendedWithoutN8nCloudSupport.

💡 This rule is manually fixable by editor suggestions.

Rule Details

Ensures your nodes only reference credentials by their name property that match credential classes declared in your package's package.json file. This prevents security issues where nodes could access credentials from other packages.

Examples

❌ Incorrect

// MyApiCredential.credentials.ts
export class MyApiCredential implements ICredentialType {
  name = 'myApiCredential';
  displayName = 'My API';
  // ...
}

// package.json: "n8n": { "credentials": ["dist/credentials/MyApiCredential.credentials.js"] }

export class MyNode implements INodeType {
  description: INodeTypeDescription = {
    displayName: 'My Node',
    name: 'myNode',
    credentials: [
      {
        name: 'someOtherCredential', // No credential class with this name in package
        required: true,
      },
    ],
    // ...
  };
}

✅ Correct

// MyApiCredential.credentials.ts
export class MyApiCredential implements ICredentialType {
  name = 'myApiCredential'; // This name must match what's used in nodes
  displayName = 'My API';
  // ...
}

// package.json: "n8n": { "credentials": ["dist/credentials/MyApiCredential.credentials.js"] }

export class MyNode implements INodeType {
  description: INodeTypeDescription = {
    displayName: 'My Node',
    name: 'myNode',
    credentials: [
      {
        name: 'myApiCredential', // Matches credential class name property
        required: true,
      },
    ],
    // ...
  };
}

Setup

Declare your credential files in package.json and ensure the credential name in nodes matches the name property in your credential classes:

{
  "name": "n8n-nodes-my-service",
  "n8n": {
    "credentials": [
      "dist/credentials/MyApiCredential.credentials.js"
    ]
  }
}