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[Snyk] Upgrade express from 4.17.1 to 4.22.1 #722

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[Snyk] Upgrade express from 4.17.1 to 4.22.1 #722

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@nejidevelops nejidevelops commented Jan 17, 2026

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Snyk has created this PR to upgrade express from 4.17.1 to 4.22.1.

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 15 versions ahead of your current version.

  • The recommended version was released 2 months ago.

Issues fixed by the recommended upgrade:

Issue Score Exploit Maturity
high severity Allocation of Resources Without Limits or Throttling
SNYK-JS-QS-14724253		 319 Proof of Concept
high severity Prototype Poisoning
SNYK-JS-QS-3153490		 319 Proof of Concept
high severity Asymmetric Resource Consumption (Amplification)
SNYK-JS-BODYPARSER-7926860		 319 No Known Exploit
medium severity Cross-site Scripting (XSS)
SNYK-JS-COOKIE-8163060		 319 No Known Exploit
medium severity Open Redirect
SNYK-JS-EXPRESS-6474509		 319 No Known Exploit
medium severity Cross-site Scripting
SNYK-JS-EXPRESS-7926867		 319 No Known Exploit
medium severity Regular Expression Denial of Service (ReDoS)
SNYK-JS-PATHTOREGEXP-7925106		 319 Proof of Concept
medium severity Regular Expression Denial of Service (ReDoS)
SNYK-JS-PATHTOREGEXP-8482416		 319 Proof of Concept
low severity Cross-site Scripting
SNYK-JS-SERVESTATIC-7926865		 319 No Known Exploit
low severity Cross-site Scripting
SNYK-JS-SEND-7926862		 319 No Known Exploit
low severity Improper Validation of Syntactic Correctness of Input
SNYK-JS-AWSSDK-14908841		 319 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 4.17.1 to 4.22.1
cf89720 
Snyk has created this PR to upgrade express from 4.17.1 to 4.22.1.

See this package in npm:
express

See this project in Snyk:
https://app.snyk.io/org/newtonombese1/project/1daa4791-9c53-4cad-8759-d7bd88ccc53a?utm_source=github&utm_medium=referral&page=upgrade-pr
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gemini-code-assist bot commented Jan 17, 2026

Summary of Changes

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!

This pull request is an automated security update to bring the express framework to its latest stable version, 4.22.1. The primary goal is to mitigate a range of identified vulnerabilities, thereby enhancing the application's overall security posture and stability. This update involves a significant refresh of the dependency tree, ensuring that the project benefits from the most recent fixes and improvements across its underlying packages.

Highlights

  • Security Upgrade: This pull request upgrades the express dependency from version 4.17.1 to 4.22.1 to address multiple high and medium severity vulnerabilities.
  • Vulnerability Resolution: The upgrade resolves critical issues including 'Allocation of Resources Without Limits or Throttling', 'Prototype Poisoning', 'Asymmetric Resource Consumption (Amplification)', 'Cross-site Scripting (XSS)', 'Open Redirect', and 'Regular Expression Denial of Service (ReDoS)' across various sub-dependencies.
  • Dependency Updates: The express upgrade pulls in numerous transitive dependency updates, ensuring the project benefits from the latest security patches and bug fixes in its ecosystem.

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Code Review

This pull request, generated by Snyk, upgrades express from 4.17.1 to 4.22.1, which resolves several security vulnerabilities. This is a valuable update. However, the upgrade spans multiple minor versions and introduces at least one potentially breaking change and a deprecation. I've added a comment highlighting these changes, particularly the new default depth limit for URL-encoded body parsing, which could impact your application if it handles deeply nested objects. Please review the comment and verify your application's behavior to ensure a smooth upgrade.

course-02/exercises/udacity-c2-restapi/package.json
"body-parser": "^1.19.0",
"email-validator": "^2.0.4",
"express": "^4.17.1",
"express": "^4.22.1",
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critical

This upgrade to Express includes a potentially breaking change and a deprecation that you should be aware of.

1. Potential Breaking Change (Critical):
Version 4.20.0 changed the default depth for parsing URL-encoded data from Infinity to 32. This could lead to data loss or runtime errors if your application processes deeply nested objects in URL-encoded request bodies.

Please verify your application's usage and, if necessary, configure the depth option in your urlencoded middleware:

// Example for express.urlencoded()
app.use(express.urlencoded({ extended: true, depth: 50 })); // Set a higher limit if needed

// Example for body-parser.urlencoded()
app.use(bodyParser.urlencoded({ extended: true, depth: 50 }));

2. Deprecation Notice (Medium):
Version 4.21.0 deprecated the use of the special "back" value in res.redirect(). It's recommended to move away from this feature. If you use res.redirect('back'), consider refactoring it to use the Referer header with a fallback:

const backURL = req.header('Referer') || '/';
res.redirect(backURL);

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