[Snyk] Security upgrade express from 4.22.2 to 5.1.0

[caniszczyk]

Snyk has created this PR to fix 2 vulnerabilities in the npm dependencies of this project.

Snyk changed the following file(s):

• examples/kustomize/package.json
• examples/kustomize/package-lock.json

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score
	Uncaught Exception SNYK-JS-QS-19432019	738
	Allocation of Resources Without Limits or Throttling SNYK-JS-QS-19432017	708

Breaking Change Risk

Notice: This assessment is enhanced by AI.

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Learn how to fix vulnerabilities with free interactive lessons:

🦉 Allocation of Resources Without Limits or Throttling
🦉 Uncaught Exception

[caniszczyk]

The upgrade from Express v4 to v5 is a major version jump with significant breaking changes that require code modifications and thorough testing. This is a high-risk upgrade.

Key Breaking Changes:

• Node.js Version: Support for Node.js versions older than 18.x has been dropped. [6]
• Removed and Renamed Methods: Many deprecated methods from v4 are now removed. [9] This includes:
  • app.del(): Must be replaced with app.delete(). [2, 4]
  • res.send(status, body): Use the chained res.status(status).send(body) method instead. [1]
  • req.param(name): This has been removed. You must now access parameters directly from req.params, req.body, or req.query. [5, 9]
  • res.redirect('back'): This magic string is no longer supported. [1, 6]
• Asynchronous Error Handling: Express 5 now automatically catches errors from async functions and forwards them to your error-handling middleware, which may change how you handle errors in async routes. [2, 8, 10]
• Routing and Path Matching: The path matching engine was updated. Inline regular expressions in routes are no longer supported to mitigate security risks (ReDoS attacks). [1, 6, 8]
• Body Parsing: The built-in bodyParser() middleware has been removed, and req.body is no longer initialized to an empty object by default. [1, 8]

Recommendation:

This upgrade requires significant developer action. Do not merge without a dedicated migration effort. The Express team has provided an official migration guide and a codemod tool (@expressjs/codemod) to help automate many of the necessary changes. [2, 3, 7]

Action Required:

1. Ensure your environment runs Node.js 18 or newer.
2. Run the official @expressjs/codemod tool to update your codebase. [2]
3. Manually review and update route definitions, especially those using regular expressions.
4. Thoroughly test your application, paying close attention to routing, request parsing, and error handling.

Notice 🤖: This content was augmented using artificial intelligence. AI-generated content may contain errors and should be reviewed for accuracy before use.

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