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Update dependency express to v4.19.2 [SECURITY]#3047

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Update dependency express to v4.19.2 [SECURITY]#3047
renovate[bot] wants to merge 1 commit intomasterfrom
renovate/npm-express-vulnerability

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@renovate renovate bot commented Aug 14, 2025

This PR contains the following updates:

Package Change Age Confidence
express (source) 4.17.14.19.2 age confidence

GitHub Vulnerability Alerts

CVE-2024-29041

Impact

Versions of Express.js prior to 4.19.2 and pre-release alpha and beta versions before 5.0.0-beta.3 are affected by an open redirect vulnerability using malformed URLs.

When a user of Express performs a redirect using a user-provided URL Express performs an encode using encodeurl on the contents before passing it to the location header. This can cause malformed URLs to be evaluated in unexpected ways by common redirect allow list implementations in Express applications, leading to an Open Redirect via bypass of a properly implemented allow list.

The main method impacted is res.location() but this is also called from within res.redirect().

Patches

expressjs/express@0867302
expressjs/express@0b74695

An initial fix went out with express@4.19.0, we then patched a feature regression in 4.19.1 and added improved handling for the bypass in 4.19.2.

Workarounds

The fix for this involves pre-parsing the url string with either require('node:url').parse or new URL. These are steps you can take on your own before passing the user input string to res.location or res.redirect.

Resources

https://github.com/expressjs/express/pull/5539
https://github.com/koajs/koa/issues/1800
https://expressjs.com/en/4x/api.html#res.location


Release Notes

expressjs/express (express)

v4.19.2

Compare Source

==========

  • Improved fix for open redirect allow list bypass

v4.19.1

Compare Source

==========

  • Allow passing non-strings to res.location with new encoding handling checks

v4.19.0

Compare Source

==========

  • Prevent open redirect allow list bypass due to encodeurl
  • deps: cookie@​0.6.0

v4.18.3

Compare Source

==========

  • Fix routing requests without method
  • deps: body-parser@​1.20.2
    • Fix strict json error message on Node.js 19+
    • deps: content-type@~1.0.5
    • deps: raw-body@​2.5.2
  • deps: cookie@​0.6.0
    • Add partitioned option

v4.18.2

Compare Source

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

  • Fix regression routing a large stack in a single route
  • deps: body-parser@​1.20.1
    • deps: qs@​6.11.0
    • perf: remove unnecessary object clone
  • deps: qs@​6.11.0

v4.18.1

Compare Source

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

  • Fix hanging on large stack of sync routes

v4.18.0

Compare Source

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

  • Add "root" option to res.download
  • Allow options without filename in res.download
  • Deprecate string and non-integer arguments to res.status
  • Fix behavior of null/undefined as maxAge in res.cookie
  • Fix handling very large stacks of sync middleware
  • Ignore Object.prototype values in settings through app.set/app.get
  • Invoke default with same arguments as types in res.format
  • Support proper 205 responses using res.send
  • Use http-errors for res.format error
  • deps: body-parser@​1.20.0
    • Fix error message for json parse whitespace in strict
    • Fix internal error when inflated body exceeds limit
    • Prevent loss of async hooks context
    • Prevent hanging when request already read
    • deps: depd@​2.0.0
    • deps: http-errors@​2.0.0
    • deps: on-finished@​2.4.1
    • deps: qs@​6.10.3
    • deps: raw-body@​2.5.1
  • deps: cookie@​0.5.0
    • Add priority option
    • Fix expires option to reject invalid dates
  • deps: depd@​2.0.0
    • Replace internal eval usage with Function constructor
    • Use instance methods on process to check for listeners
  • deps: finalhandler@​1.2.0
    • Remove set content headers that break response
    • deps: on-finished@​2.4.1
    • deps: statuses@​2.0.1
  • deps: on-finished@​2.4.1
    • Prevent loss of async hooks context
  • deps: qs@​6.10.3
  • deps: send@​0.18.0
    • Fix emitted 416 error missing headers property
    • Limit the headers removed for 304 response
    • deps: depd@​2.0.0
    • deps: destroy@​1.2.0
    • deps: http-errors@​2.0.0
    • deps: on-finished@​2.4.1
    • deps: statuses@​2.0.1
  • deps: serve-static@​1.15.0
    • deps: send@​0.18.0
  • deps: statuses@​2.0.1
    • Remove code 306
    • Rename 425 Unordered Collection to standard 425 Too Early

v4.17.3

Compare Source

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

  • deps: accepts@~1.3.8
    • deps: mime-types@~2.1.34
    • deps: negotiator@​0.6.3
  • deps: body-parser@​1.19.2
    • deps: bytes@​3.1.2
    • deps: qs@​6.9.7
    • deps: raw-body@​2.4.3
  • deps: cookie@​0.4.2
  • deps: qs@​6.9.7
    • Fix handling of __proto__ keys
  • pref: remove unnecessary regexp for trust proxy

v4.17.2

Compare Source

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

  • Fix handling of undefined in res.jsonp
  • Fix handling of undefined when "json escape" is enabled
  • Fix incorrect middleware execution with unanchored RegExps
  • Fix res.jsonp(obj, status) deprecation message
  • Fix typo in res.is JSDoc
  • deps: body-parser@​1.19.1
    • deps: bytes@​3.1.1
    • deps: http-errors@​1.8.1
    • deps: qs@​6.9.6
    • deps: raw-body@​2.4.2
    • deps: safe-buffer@​5.2.1
    • deps: type-is@~1.6.18
  • deps: content-disposition@​0.5.4
    • deps: safe-buffer@​5.2.1
  • deps: cookie@​0.4.1
    • Fix maxAge option to reject invalid values
  • deps: proxy-addr@~2.0.7
    • Use req.socket over deprecated req.connection
    • deps: forwarded@​0.2.0
    • deps: ipaddr.js@​1.9.1
  • deps: qs@​6.9.6
  • deps: safe-buffer@​5.2.1
  • deps: send@​0.17.2
    • deps: http-errors@​1.8.1
    • deps: ms@​2.1.3
    • pref: ignore empty http tokens
  • deps: serve-static@​1.14.2
    • deps: send@​0.17.2
  • deps: setprototypeof@​1.2.0

Configuration

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

@renovate renovate bot added the dependencies Pull requests that update a dependency file label Aug 14, 2025
@renovate renovate bot force-pushed the renovate/npm-express-vulnerability branch from 5f15279 to 0170ca4 Compare October 15, 2025 23:52
@renovate renovate bot changed the title Update dependency express to v4.20.0 [SECURITY] Update dependency express to v4.19.2 [SECURITY] Oct 15, 2025
@renovate renovate bot force-pushed the renovate/npm-express-vulnerability branch from 0170ca4 to 8a7ca2b Compare November 19, 2025 07:38
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