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@renovate renovate bot commented Dec 1, 2025

This PR contains the following updates:

Package Change Age Confidence
express (source) 4.21.2 -> 5.2.0 age confidence
express (source) 5.1.0 -> 5.2.0 age confidence

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GitHub Vulnerability Alerts

CVE-2024-51999

Impact

when using the extended query parser in express ('query parser': 'extended'), the request.query object inherits all object prototype properties, but these properties can be overwritten by query string parameter keys that match the property names

Important

the extended query parser is the default in express 4; this was changed in express 5 which by default uses the simple query parser

Patches

the issue has been patched to ensure request.query is a plain object so request.query no longer has object prototype properties. this brings the default behavior of extended query parsing in line with express's default simple query parser

Workaround

this only impacts users using extended query parsing ('query parser': 'extended'), which is the default in express 4, but not express 5. all users are encouraged to upgrade to the patched versions, but can otherwise work around this issue:

provide qs directly and specify plainObjects: true

app.set('query parser',
  function (str) {
    return qs.parse(str, {
      plainObjects: true
  });
});

Release Notes

expressjs/express (express)

v5.2.0

Compare Source

========================

  • Security fix for CVE-2024-51999 (GHSA-pj86-cfqh-vqx6)
  • deps: body-parser@^2.2.1
  • A deprecation warning was added when using res.redirect with undefined arguments, Express now emits a warning to help detect calls that pass undefined as the status or URL and make them easier to fix.

v5.1.0

Compare Source

========================

  • Add support for Uint8Array in res.send()
  • Add support for ETag option in res.sendFile()
  • Add support for multiple links with the same rel in res.links()
  • Add funding field to package.json
  • perf: use loop for acceptParams
  • refactor: prefix built-in node module imports
  • deps: remove setprototypeof
  • deps: remove safe-buffer
  • deps: remove utils-merge
  • deps: remove methods
  • deps: remove depd
  • deps: debug@^4.4.0
  • deps: body-parser@^2.2.0
  • deps: router@^2.2.0
  • deps: content-type@^1.0.5
  • deps: finalhandler@^2.1.0
  • deps: qs@^6.14.0
  • deps: server-static@2.2.0
  • deps: type-is@2.0.1

v5.0.1

Compare Source

==========

v5.0.0

Compare Source

=========================

  • remove:
    • path-is-absolute dependency - use path.isAbsolute instead
  • breaking:
    • res.status() accepts only integers, and input must be greater than 99 and less than 1000
      • will throw a RangeError: Invalid status code: ${code}. Status code must be greater than 99 and less than 1000. for inputs outside this range
      • will throw a TypeError: Invalid status code: ${code}. Status code must be an integer. for non integer inputs
    • deps: send@​1.0.0
    • res.redirect('back') and res.location('back') is no longer a supported magic string, explicitly use req.get('Referrer') || '/'.
  • change:
    • res.clearCookie will ignore user provided maxAge and expires options
  • deps: cookie-signature@^1.2.1
  • deps: debug@​4.3.6
  • deps: merge-descriptors@^2.0.0
  • deps: serve-static@^2.1.0
  • deps: qs@​6.13.0
  • deps: accepts@^2.0.0
  • deps: mime-types@^3.0.0
    • application/javascript => text/javascript
  • deps: type-is@^2.0.0
  • deps: content-disposition@^1.0.0
  • deps: finalhandler@^2.0.0
  • deps: fresh@^2.0.0
  • deps: body-parser@^2.0.1
  • deps: send@^1.1.0

v4.22.1

Compare Source

v4.22.0

Compare Source


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This PR was generated by Mend Renovate. View the repository job log.

@renovate renovate bot merged commit 2f62d2e into main Dec 1, 2025
4 checks passed
@renovate renovate bot deleted the renovate/npm-express-vulnerability branch December 2, 2025 00:48
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