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[Snyk] Upgrade express from 4.18.2 to 4.21.2 #74

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[Snyk] Upgrade express from 4.18.2 to 4.21.2 #74

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@nejidevelops nejidevelops commented Jun 1, 2025

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Snyk has created this PR to upgrade express from 4.18.2 to 4.21.2.

ℹ️ Keep your dependencies up-to-date. This makes it easier to fix existing vulnerabilities and to more quickly identify and fix newly disclosed vulnerabilities when they affect your project.

  • The recommended version is 8 versions ahead of your current version.

  • The recommended version was released 6 months ago.

Issues fixed by the recommended upgrade:

Issue Score Exploit Maturity
high severity Asymmetric Resource Consumption (Amplification)
SNYK-JS-BODYPARSER-7926860		 624 No Known Exploit
medium severity Open Redirect
SNYK-JS-EXPRESS-6474509		 624 No Known Exploit
medium severity Cross-site Scripting
SNYK-JS-EXPRESS-7926867		 624 No Known Exploit
medium severity Regular Expression Denial of Service (ReDoS)
SNYK-JS-PATHTOREGEXP-7925106		 624 Proof of Concept
medium severity Regular Expression Denial of Service (ReDoS)
SNYK-JS-PATHTOREGEXP-8482416		 624 Proof of Concept
low severity Cross-site Scripting
SNYK-JS-SEND-7926862		 624 No Known Exploit
low severity Cross-site Scripting
SNYK-JS-SERVESTATIC-7926865		 624 No Known Exploit
Release notes
Package name: express from express GitHub release notes

Important

  • Check the changes in this PR to ensure they won't cause issues with your project.
  • This PR was automatically created by Snyk using the credentials of a real user.
  • Max score is 1000. Note that the real score may have changed since the PR was raised.

Note: You are seeing this because you or someone else with access to this repository has authorized Snyk to open upgrade PRs.

For more information:

@snyk-bot
fix: upgrade express from 4.18.2 to 4.21.2
71dee27 
Snyk has created this PR to upgrade express from 4.18.2 to 4.21.2.

See this package in npm:
express

See this project in Snyk:
https://app.snyk.io/org/newtonombese1/project/0f7cb4e0-d844-44aa-bc90-5957f9bcb149?utm_source=github&utm_medium=referral&page=upgrade-pr
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Hello @nejidevelops, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

Summary of Changes

Hello team, Gemini here to provide a summary of this pull request. This PR, automatically generated by Snyk, aims to upgrade the express dependency from version 4.18.2 to 4.21.2. The primary motivation for this upgrade is to address several security vulnerabilities identified in the current and intermediate versions of express and its transitive dependencies. The changes involve updating the version specified in the package.json file and the corresponding package-lock.json file, which cascades into updates for numerous underlying packages.

Highlights

  • Dependency Upgrade: The main change is the upgrade of the express package from version 4.18.2 to 4.21.2.
  • Security Vulnerability Fixes: This upgrade addresses multiple security vulnerabilities, including issues categorized as High, Medium, and Low severity, related to asymmetric resource consumption, open redirect, cross-site scripting, and regular expression denial of service (ReDoS).
  • Transitive Dependency Updates: As part of the express upgrade, several transitive dependencies have also been updated in the package-lock.json file to compatible and potentially more secure versions.

Changelog

Click here to see the changelog
  • Socket IO Chat App/package-lock.json
    • Updated the locked version and integrity hash for express from 4.18.2 to 4.21.2.
    • Updated the locked version and integrity hash for body-parser from 1.20.1 to 1.20.3.
    • Updated the locked version and integrity hash for content-type from 1.0.4 to 1.0.5.
    • Updated the locked version and integrity hash for cookie from 0.5.0 to 0.7.1.
    • Updated the locked version and integrity hash for encodeurl from 1.0.2 to 2.0.0.
    • Updated the locked version and integrity hash for finalhandler from 1.2.0 to 1.3.1.
    • Updated the locked version and integrity hash for function-bind from 1.1.1 to 1.1.2.
    • Updated the locked version and integrity hash for get-intrinsic from 1.1.3 to 1.3.0.
    • Updated the locked version and integrity hash for merge-descriptors from 1.0.1 to 1.0.3.
    • Updated the locked version and integrity hash for object-inspect from 1.12.2 to 1.13.4.
    • Updated the locked version and integrity hash for path-to-regexp from 0.1.7 to 0.1.12.
    • Updated the locked version and integrity hash for qs from 6.11.0 to 6.13.0.
    • Updated the locked version and integrity hash for raw-body from 2.5.1 to 2.5.2.
    • Updated the locked version and integrity hash for send from 0.18.0 to 0.19.0.
    • Updated the locked version and integrity hash for serve-static from 1.15.0 to 1.16.2.
    • Added new transitive dependencies: call-bind-apply-helpers, call-bound, dunder-proto, es-define-property, es-errors, es-object-atoms, get-proto, gopd, hasown, math-intrinsics, side-channel-list, side-channel-map, side-channel-weakmap.
    • Removed transitive dependency: has.
  • Socket IO Chat App/package.json
    • Updated the express dependency version range to ^4.21.2.
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Dependency bumps,
Fixing flaws, making code safe,
Express runs faster.

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Code Review

This pull request, automatically generated by Snyk, upgrades the express package from version 4.18.2 to 4.21.2. This is a valuable update as it addresses several security vulnerabilities, as detailed in the PR description.

The changes primarily involve updates to package.json and package-lock.json to reflect the new express version and its transitive dependencies.

While this is a minor version bump for Express, it's crucial to thoroughly test the application after merging these changes. Dependency updates, even minor ones, can sometimes introduce subtle behavioral changes or expose issues in how the application interacts with the updated packages.

Specifically, please pay attention to the following points derived from the release notes of the intermediate Express versions and its dependencies:

  1. Express 4.20.0 Changes:
    • The default depth for parsing URL-encoded data has changed from Infinity to 32. If your application processes deeply nested URL-encoded data, this could be a breaking change.
    • res.redirect no longer renders a link in HTML by default. If your application relied on this behavior, it will need to be adjusted.
  2. [email protected] Change:
    • express and some of its core dependencies (like finalhandler and serve-static) now use encodeurl@~2.0.0. This version of encodeurl throws a TypeError if a non-string argument is passed to it. Previously, it might have attempted type coercion. If your application or custom middleware inadvertently passed non-strings to Express functions that internally use encodeurl, this could now lead to runtime errors.

Overall, the upgrade is recommended for security reasons. Please proceed with testing and verification.

Summary of Findings

  • Security Vulnerability Remediation: The primary benefit of this PR is the upgrade of express to version 4.21.2, which addresses multiple security vulnerabilities listed in the PR description.
  • Importance of Testing: Due to the nature of dependency upgrades and specific changes in Express and its dependencies, thorough end-to-end testing of the application is crucial before and after merging this PR.
  • Potential Behavior Change: URL-encoded Data Parsing Depth: Express 4.20.0 changed the default parsing depth for URL-encoded data from Infinity to 32. Applications handling deeply nested URL-encoded data should verify this change.
  • Potential Behavior Change: res.redirect() HTML Output: Express 4.20.0 removed the default HTML link rendering in res.redirect(). This might affect applications that relied on this specific output.
  • Potential Error Handling Change: [email protected]: The encodeurl package, a dependency of Express, was upgraded to 2.0.0. This version now throws a TypeError for non-string inputs, which could affect parts of the application if they were previously relying on implicit type coercion by encodeurl.

Merge Readiness

This pull request is beneficial as it upgrades express and mitigates several security vulnerabilities. The changes in package.json and package-lock.json appear correct for this upgrade.

However, given the potential behavior changes noted in Express 4.20.0 and [email protected], it is highly recommended that the application undergoes thorough testing to ensure no regressions or unexpected issues arise from this upgrade. Pay particular attention to URL parsing, form submissions, and redirect logic.

I am unable to approve the pull request directly. After successful testing and verification by the development team, this PR should be safe to merge. Please ensure your CI pipeline and any manual QA processes are completed.

Socket IO Chat App/package.json
"@socket.io/redis-adapter": "^7.1.0",
"dotenv": "^14.3.2",
"express": "^4.18.2",
"express": "^4.21.2",
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medium

The upgrade of express to ^4.21.2 is beneficial for security. However, please be aware of a few notable changes in the versions between 4.18.2 and 4.21.2 that might impact your application:

  • Express 4.20.0 introduced some important changes:
    • The default depth for parsing URL-encoded form data (e.g., via express.urlencoded()) was changed from Infinity to 32. If your application relies on parsing very deeply nested objects from URL-encoded request bodies, this new limit might affect it.
    • The behavior of res.redirect() was changed to no longer render an HTML link by default when a redirect occurs. If you were relying on this HTML output for any reason, this is a change to note.
  • Dependency encodeurl Major Version Bump to 2.0.0:
    • Express and several of its core middleware (like finalhandler, serve-static) now depend on encodeurl@~2.0.0. A key change in [email protected] is that it now throws a TypeError if a non-string argument is passed to it. Previously, it might have attempted to coerce non-string types. If any part of your application or custom middleware was inadvertently passing non-string values to Express APIs that internally use encodeurl (e.g., for URL generation in redirects or static file serving), this could now result in runtime errors.

It's recommended to thoroughly test your application, especially functionalities related to URL parsing, redirects, and form data submission, to ensure these changes do not adversely affect your application.

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