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Update dependency express to v4.19.2 [SECURITY] - autoclosed #99

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@renovate renovate bot commented Mar 30, 2024

This PR contains the following updates:

Package Change Age Adoption Passing Confidence
express (source) 4.18.3 -> 4.19.2 age adoption passing 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 [email protected], 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.

References

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


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

@renovate renovate bot changed the title Update dependency express to v4.19.2 [SECURITY] Update dependency express to v4.19.2 [SECURITY] - autoclosed Apr 3, 2024
@renovate renovate bot closed this Apr 3, 2024
@renovate renovate bot deleted the renovate-npm-express-vulnerability branch April 3, 2024 12:43
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