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@renovate renovate bot commented Dec 1, 2025

This PR contains the following updates:

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

GitHub Vulnerability Alerts

CVE-2024-51999

Withdrawn Advisory

This advisory has been withdrawn because it describes a correctness bug, not a vulnerability with real security impact. This link is maintained to preserve external references.

Original Description

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.

Configuration

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codecov-commenter commented Dec 1, 2025

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 60.40%. Comparing base (ccb2a3b) to head (e7b8ba2).
✅ All tests successful. No failed tests found.

Additional details and impacted files
@@           Coverage Diff           @@
##             main    #1175   +/-   ##
=======================================
  Coverage   60.40%   60.40%           
=======================================
  Files          35       35           
  Lines        1038     1038           
  Branches      351      351           
=======================================
  Hits          627      627           
  Misses        341      341           
  Partials       70       70           

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@renovate renovate bot changed the title fix(deps): update dependency express to v5.2.0 [security] fix(deps): update dependency express to v5.2.0 [security] - autoclosed Dec 2, 2025
@renovate renovate bot closed this Dec 2, 2025
@renovate renovate bot deleted the renovate/npm-express-vulnerability branch December 2, 2025 21:03
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2 participants