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Update dependency express to v4.20.0 [SECURITY]#1341

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Update dependency express to v4.20.0 [SECURITY]#1341
renovate[bot] wants to merge 1 commit intomasterfrom
renovate/npm-express-vulnerability

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@renovate renovate bot commented Mar 23, 2026

This PR contains the following updates:

Package Change Age Confidence
express (source) 4.19.24.20.0 age confidence

GitHub Vulnerability Alerts

CVE-2024-43796

Impact

In express <4.20.0, passing untrusted user input - even after sanitizing it - to response.redirect() may execute untrusted code

Patches

this issue is patched in express 4.20.0

Workarounds

users are encouraged to upgrade to the patched version of express, but otherwise can workaround this issue by making sure any untrusted inputs are safe, ideally by validating them against an explicit allowlist

Details

successful exploitation of this vector requires the following:

  1. The attacker MUST control the input to response.redirect()
  2. express MUST NOT redirect before the template appears
  3. the browser MUST NOT complete redirection before:
  4. the user MUST click on the link in the template

Release Notes

expressjs/express (express)

v4.20.0

Compare Source

==========

  • deps: serve-static@​0.16.0
    • Remove link renderization in html while redirecting
  • deps: send@​0.19.0
    • Remove link renderization in html while redirecting
  • deps: body-parser@​0.6.0
    • add depth option to customize the depth level in the parser
    • IMPORTANT: The default depth level for parsing URL-encoded data is now 32 (previously was Infinity)
  • Remove link renderization in html while using res.redirect
  • deps: path-to-regexp@​0.1.10
    • Adds support for named matching groups in the routes using a regex
    • Adds backtracking protection to parameters without regexes defined
  • deps: encodeurl@~2.0.0
    • Removes encoding of \, |, and ^ to align better with URL spec
  • Deprecate passing options.maxAge and options.expires to res.clearCookie
    • Will be ignored in v5, clearCookie will set a cookie with an expires in the past to instruct clients to delete the cookie

Configuration

📅 Schedule: Branch creation - "" (UTC), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.


  • If you want to rebase/retry this PR, check this box

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

@renovate renovate bot added the security label Mar 23, 2026
@renovate renovate bot force-pushed the renovate/npm-express-vulnerability branch from bf11baa to 1b7e27e Compare March 23, 2026 16:26
@renovate renovate bot changed the title Update dependency express to v4.20.0 [SECURITY] Update dependency express to v4.20.0 [SECURITY] - autoclosed Mar 27, 2026
@renovate renovate bot closed this Mar 27, 2026
@renovate renovate bot deleted the renovate/npm-express-vulnerability branch March 27, 2026 02:02
@renovate renovate bot changed the title Update dependency express to v4.20.0 [SECURITY] - autoclosed Update dependency express to v4.20.0 [SECURITY] Mar 30, 2026
@renovate renovate bot reopened this Mar 30, 2026
@renovate renovate bot force-pushed the renovate/npm-express-vulnerability branch 2 times, most recently from 1b7e27e to 63dc460 Compare March 30, 2026 22:16
@renovate renovate bot force-pushed the renovate/npm-express-vulnerability branch from 63dc460 to 6def7a7 Compare April 1, 2026 21:09
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