Compare Versions - express

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5.2.1

What's Changed

[!IMPORTANT]
The prior release (5.2.0) included an erroneous breaking change related to the extended query parser. There is no actual security vulnerability associated with this behavior (CVE-2024-51999 has been rejected). The change has been fully reverted in this release.

Release: 5.2.1 by @UlisesGascon in https://github.com/expressjs/express/pull/6933

Full Changelog: https://github.com/expressjs/express/compare/v5.2.0...v5.2.1

5.2.0

Important: Security

Security fix for CVE-2024-51999 (GHSA-pj86-cfqh-vqx6)

What's Changed

build(deps): bump github/codeql-action from 3.28.11 to 3.28.13 by @dependabot[bot] in https://github.com/expressjs/express/pull/6429
Refactor: simplify acceptsLanguages implementation using spread operator by @Ayoub-Mabrouk in https://github.com/expressjs/express/pull/6137
increased code coverage of utils.js file by @ashish3011 in https://github.com/expressjs/express/pull/6386
chore: remove duplicate word by @dufucun in https://github.com/expressjs/express/pull/6456
build(deps): bump github/codeql-action from 3.28.13 to 3.28.16 by @dependabot[bot] in https://github.com/expressjs/express/pull/6498
build(deps): bump actions/setup-node from 4.3.0 to 4.4.0 by @dependabot[bot] in https://github.com/expressjs/express/pull/6497
build(deps): bump actions/download-artifact from 4.2.1 to 4.3.0 by @dependabot[bot] in https://github.com/expressjs/express/pull/6496
ci: add node.js 24 to test matrix by @Phillip9587 in https://github.com/expressjs/express/pull/6504
ci: update codeql config by @Phillip9587 in https://github.com/expressjs/express/pull/6488
chore: wider range for query test skip by @jonchurch in https://github.com/expressjs/express/pull/6512
chore: fix typos in test by @noritaka1166 in https://github.com/expressjs/express/pull/6535
ci: disable credential persistence for checkout actions by @mertssmnoglu in https://github.com/expressjs/express/pull/6522
ci: allow manual triggering of workflow by @shivarm in https://github.com/expressjs/express/pull/6515
test: add coverage for app.listen() variants by @kgarg1 in https://github.com/expressjs/express/pull/6476
docs: move documentation and charters to the discussions and .github … by @bjohansebas in https://github.com/expressjs/express/pull/6427
build(deps): bump github/codeql-action from 3.28.16 to 3.28.18 by @dependabot[bot] in https://github.com/expressjs/express/pull/6549
build(deps): bump ossf/scorecard-action from 2.4.1 to 2.4.2 by @dependabot[bot] in https://github.com/expressjs/express/pull/6548
chore: enforce explicit Buffer import and add lint rule by @shivarm in https://github.com/expressjs/express/pull/6525
chore: use node protocol for querystring by @shivarm in https://github.com/expressjs/express/pull/6520
chore: fix typo by @mountdisk in https://github.com/expressjs/express/pull/6609
build(deps): bump github/codeql-action from 3.28.18 to 3.29.2 by @dependabot[bot] in https://github.com/expressjs/express/pull/6618
add deprecation warnings for redirect arguments undefined by @bjohansebas in https://github.com/expressjs/express/pull/6405
ci: run CI when the markdown changes by @bjohansebas in https://github.com/expressjs/express/pull/6632
doc: fix CONTRIBUTING link by @jonchurch in https://github.com/expressjs/express/pull/6653
doc: update contributing guidelines and code of conduct links by @ShubhamOulkar in https://github.com/expressjs/express/pull/6601
build(deps-dev): bump morgan from 1.10.0 to 1.10.1 by @dependabot[bot] in https://github.com/expressjs/express/pull/6679
build(deps-dev): bump cookie-session from 2.1.0 to 2.1.1 by @dependabot[bot] in https://github.com/expressjs/express/pull/6678
lint: add --fix flag to automatic fix linting issue by @shivarm in https://github.com/expressjs/express/pull/6644
chore: ignore yarn.lock file and update example by @shivarm in https://github.com/expressjs/express/pull/6588
lib: use req.socket over deprecated req.connection by @bjohansebas in https://github.com/expressjs/express/pull/6705
doc: update express app example by @shivarm in https://github.com/expressjs/express/pull/6718
build(deps): bump github/codeql-action from 3.29.2 to 3.29.5 by @dependabot[bot] in https://github.com/expressjs/express/pull/6675
Remove history.md from being packaged on publish by @sheplu in https://github.com/expressjs/express/pull/6780
build(deps): bump actions/checkout from 4.2.2 to 5.0.0 by @dependabot[bot] in https://github.com/expressjs/express/pull/6797
build(deps): bump github/codeql-action from 3.29.7 to 3.30.5 by @dependabot[bot] in https://github.com/expressjs/express/pull/6796
build(deps): bump ossf/scorecard-action from 2.4.2 to 2.4.3 by @dependabot[bot] in https://github.com/expressjs/express/pull/6795
build(deps): bump actions/setup-node from 4.4.0 to 5.0.0 by @dependabot[bot] in https://github.com/expressjs/express/pull/6794
build(deps): bump actions/download-artifact from 4.3.0 to 5.0.0 by @dependabot[bot] in https://github.com/expressjs/express/pull/6793
ci: add node.js 25 to test matrix by @Phillip9587 in https://github.com/expressjs/express/pull/6843
build(deps): bump actions/download-artifact from 5.0.0 to 6.0.0 by @dependabot[bot] in https://github.com/expressjs/express/pull/6871
build(deps): bump actions/setup-node from 5.0.0 to 6.0.0 by @dependabot[bot] in https://github.com/expressjs/express/pull/6870
build(deps): bump github/codeql-action from 3.30.5 to 4.31.2 by @dependabot[bot] in https://github.com/expressjs/express/pull/6869
build(deps): bump actions/upload-artifact from 4.6.2 to 5.0.0 by @dependabot[bot] in https://github.com/expressjs/express/pull/6868
chore: switch badges from badgen.net to shields.io by @Phillip9587 in https://github.com/expressjs/express/pull/6900
refactor: use cached slice in app.listen by @Tacit1 in https://github.com/expressjs/express/pull/6897
Nominate to @efekrskl for triage team by @bjohansebas in https://github.com/expressjs/express/pull/6888
docs: update emeritus triagers by @bjohansebas in https://github.com/expressjs/express/pull/6890
fix: upgrade body-parser to 2.2.1 to address CVE-2025-13466 by @shivarm in https://github.com/expressjs/express/pull/6922
build(deps): bump coverallsapp/github-action from 2.3.6 to 2.3.7 by @dependabot[bot] in https://github.com/expressjs/express/pull/6930
build(deps): bump github/codeql-action from 4.31.2 to 4.31.6 by @dependabot[bot] in https://github.com/expressjs/express/pull/6929
build(deps): bump actions/checkout from 5.0.0 to 6.0.0 by @dependabot[bot] in https://github.com/expressjs/express/pull/6928
Release: 5.2.0 by @UlisesGascon in https://github.com/expressjs/express/pull/6920

New Contributors

@ashish3011 made their first contribution in https://github.com/expressjs/express/pull/6386
@dufucun made their first contribution in https://github.com/expressjs/express/pull/6456
@noritaka1166 made their first contribution in https://github.com/expressjs/express/pull/6535
@mertssmnoglu made their first contribution in https://github.com/expressjs/express/pull/6522
@shivarm made their first contribution in https://github.com/expressjs/express/pull/6515
@kgarg1 made their first contribution in https://github.com/expressjs/express/pull/6476
@mountdisk made their first contribution in https://github.com/expressjs/express/pull/6609
@ShubhamOulkar made their first contribution in https://github.com/expressjs/express/pull/6601
@sheplu made their first contribution in https://github.com/expressjs/express/pull/6780
@Tacit1 made their first contribution in https://github.com/expressjs/express/pull/6897

Full Changelog: https://github.com/expressjs/express/compare/v5.1.0...v5.2.0

5.1.0

What's Changed

Update captains by @UlisesGascon in https://github.com/expressjs/express/pull/6027
build: Node.js 23.0 by @bjohansebas in https://github.com/expressjs/express/pull/6075
Add funding field (v5) by @bjohansebas in https://github.com/expressjs/express/pull/6064
✅ add discarded middleware test by @ctcpip in https://github.com/expressjs/express/pull/5819
update homepage link http to https by @bjohansebas in https://github.com/expressjs/express/pull/5920
Improve readme by @bjohansebas in https://github.com/expressjs/express/pull/5994
Add bjohansebas as repo captain for expressjs.com by @crandmck in https://github.com/expressjs/express/pull/6058
Remove Object.setPrototypeOf polyfill by @Phillip9587 in https://github.com/expressjs/express/pull/6081
fix(buffer): use node:buffer instead of safe-buffer by @bhavya3024 in https://github.com/expressjs/express/pull/6071
docs: Add DCO by @UlisesGascon in https://github.com/expressjs/express/pull/6048
cleanup: remove promise support check from tests by @Phillip9587 in https://github.com/expressjs/express/pull/6148
Use loop for acceptParams by @blakeembrey in https://github.com/expressjs/express/pull/6066
Improve documentation step in release process by @bjohansebas in https://github.com/expressjs/express/pull/6150
cleanup: remove unnecessary require for global Buffer by @Phillip9587 in https://github.com/expressjs/express/pull/6146
cleanup: remove AsyncLocalStorage check by @Phillip9587 in https://github.com/expressjs/express/pull/6147
update history.md for acceptParams change by @jonchurch in https://github.com/expressjs/express/pull/6177
docs: add @rxmarbles to the triage team by @UlisesGascon in https://github.com/expressjs/express/pull/6151
refactor: improve readability by @sazk07 in https://github.com/expressjs/express/pull/6173
docs: clarify the security process in the triage role by @bjohansebas in https://github.com/expressjs/express/pull/6217
chore: replace methods dependency with standard library by @jonkoops in https://github.com/expressjs/express/pull/6196
Remove utils-merge dependency - use spread syntax instead by @Phillip9587 in https://github.com/expressjs/express/pull/6091
fix(securite): fix vulnerabilities by @Abdel-Monaam-Aouini in https://github.com/expressjs/express/pull/6211
refactor: prefix built-in node module imports by @slagiewka in https://github.com/expressjs/express/pull/6236
fix: remove download size badges by @wesleytodd in https://github.com/expressjs/express/pull/6266
Remove unused depd dependency by @jonkoops in https://github.com/expressjs/express/pull/6197
fix: usage of Invalid action input 'persist-credentials' for actions/setup-node@v4 in ci.yml by @hamirmahal in https://github.com/expressjs/express/pull/6256
Add support for OSSF scorecard reporting by @UlisesGascon in https://github.com/expressjs/express/pull/5431
docs: add @Phillip9587 to the triage team by @bjohansebas in https://github.com/expressjs/express/pull/6276
fix: added a missing semicolon in css styles in examples/auth by @pr4j3sh in https://github.com/expressjs/express/pull/6297
docs: include team email in the security policy by @UlisesGascon in https://github.com/expressjs/express/pull/6278
refactor: simplify normalizeTypes function by @Ayoub-Mabrouk in https://github.com/expressjs/express/pull/6097
ci: updated github actions ci workflow by @Phillip9587 in https://github.com/expressjs/express/pull/6314
ci: fix npm install --include typo by @Phillip9587 in https://github.com/expressjs/express/pull/6324
ci: updated scorecard actions by @Phillip9587 in https://github.com/expressjs/express/pull/6322
build(deps): use carat notation for dependency versions by @dpopp07 in https://github.com/expressjs/express/pull/6317
chore(deps): update debug to ^4.4.0 by @Phillip9587 in https://github.com/expressjs/express/pull/6313
docs: retroactively note 5.0.0-beta.1 api change in history file by @dpopp07 in https://github.com/expressjs/express/pull/6333
feat(deps): body-parser@^2.1.0 by @wesleytodd in https://github.com/expressjs/express/pull/6332
feat(deps): router@^2.1.0 by @wesleytodd in https://github.com/expressjs/express/pull/6331
Update repo captains by @UlisesGascon in https://github.com/expressjs/express/pull/6234
deps: upgrade nyc by @agungjati in https://github.com/expressjs/express/pull/6122
fix (deps): update deps by @wesleytodd in https://github.com/expressjs/express/pull/6337
response: add support for ETag option in res.sendFile by @juanarbol in https://github.com/expressjs/express/pull/6073
Update multiple links to use https instead of http by @Phillip9587 in https://github.com/expressjs/express/pull/6338
Extend res.links() to allow adding multiple links with the same rel #2729 by @andvea in https://github.com/expressjs/express/pull/4885
docs: update emeritus triagers by @UlisesGascon in https://github.com/expressjs/express/pull/6345
docs: update guidance for triager nominations by @bjohansebas in https://github.com/expressjs/express/pull/6349
docs: clarify guidelines for becoming a committer by @bjohansebas in https://github.com/expressjs/express/pull/6364
Nominate @dpopp07 to the triage team by @UlisesGascon in https://github.com/expressjs/express/pull/6352
fix(deps): qs@^6.14.0 by @wesleytodd in https://github.com/expressjs/express/pull/6374
Add dependabot by @UlisesGascon in https://github.com/expressjs/express/pull/5435
fix dependabot config by @bjohansebas in https://github.com/expressjs/express/pull/6392
build(deps): bump github/codeql-action from 3.24.7 to 3.28.11 by @dependabot in https://github.com/expressjs/express/pull/6398
build(deps): bump ossf/scorecard-action from 2.4.0 to 2.4.1 by @dependabot in https://github.com/expressjs/express/pull/6397
feat(deps): finalhandler@2.1.0 by @wesleytodd in https://github.com/expressjs/express/pull/6373
build(deps-dev): bump cookie-session from 2.0.0 to 2.1.0 by @dependabot in https://github.com/expressjs/express/pull/6399
deps: body-parser@^2.2.0 by @UlisesGascon in https://github.com/expressjs/express/pull/6419
deps: type-is@^2.0.1 by @UlisesGascon in https://github.com/expressjs/express/pull/6420
deps: router@^2.2.0 by @UlisesGascon in https://github.com/expressjs/express/pull/6417
ci: use full SHAs for github action versions by @Phillip9587 in https://github.com/expressjs/express/pull/6415
doc: remove @mertcanaltin from Triagers by @mertcanaltin in https://github.com/expressjs/express/pull/6408
deps: serve-static@^2.2.0 by @UlisesGascon in https://github.com/expressjs/express/pull/6418
5.1.0 by @wesleytodd in https://github.com/expressjs/express/pull/6425

New Contributors

@bhavya3024 made their first contribution in https://github.com/expressjs/express/pull/6071
@jonkoops made their first contribution in https://github.com/expressjs/express/pull/6196
@Abdel-Monaam-Aouini made their first contribution in https://github.com/expressjs/express/pull/6211
@slagiewka made their first contribution in https://github.com/expressjs/express/pull/6236
@hamirmahal made their first contribution in https://github.com/expressjs/express/pull/6256
@pr4j3sh made their first contribution in https://github.com/expressjs/express/pull/6297
@Ayoub-Mabrouk made their first contribution in https://github.com/expressjs/express/pull/6097
@dpopp07 made their first contribution in https://github.com/expressjs/express/pull/6317
@agungjati made their first contribution in https://github.com/expressjs/express/pull/6122
@andvea made their first contribution in https://github.com/expressjs/express/pull/4885
@dependabot made their first contribution in https://github.com/expressjs/express/pull/6398

Full Changelog: https://github.com/expressjs/express/compare/5.0.1...v5.1.0

5.0.1

What's Changed

remove --bail from test script by @jonchurch in https://github.com/expressjs/express/pull/5962
Nominate @bjohansebas to the triage team by @UlisesGascon in https://github.com/expressjs/express/pull/6009
Link and update captains by @blakeembrey in https://github.com/expressjs/express/pull/6013
Update cookie semver lock to address CVE-2024-47764 by @joshbuker in https://github.com/expressjs/express/pull/6017
Release: 5.0.1 by @UlisesGascon in https://github.com/expressjs/express/pull/6032

Full Changelog: https://github.com/expressjs/express/compare/v5.0.0...5.0.1

5.0.0

Express v5.0.0

🎉 Express v5 is finally here! 🎉

After years of development, the long-awaited Express v5 has been officially released. This version focuses on simplifying the codebase, improving security, and dropping support for older Node.js versions to enable better performance and maintainability.

For detailed information, please check out the official Express v5 release blog post.

Most relevant details

Major Changes in v5

Node.js version support: Dropped support for Node.js versions before v18.
Routing changes: Updated to path-to-regexp@8.x, removing sub-expression regex patterns for security reasons (ReDoS mitigation).
Promise support: Middleware can now return rejected promises, caught by the router as errors.
body-parser changes: Several improvements including the ability to customize urlencoded body depth and defaulting extended to false.
Deprecated API methods removed: Removed old, deprecated API method signatures from Express v3/v4.

For a complete list of breaking changes and API deprecations, see the migration guide.

Security Updates

This release includes important security fixes, including improvements to prevent ReDoS attacks and mitigation for CVE-2024-45590. Full details can be found in the security release notes.

Migration

Be sure to check out our migration guide for instructions on how to update your applications from Express v4 to v5.

Security Guidance

For best practices, we recommend reviewing the Threat Model which outlines Express' approach to securing your applications, including tips for user input validation and other critical aspects.

What's Changed

4.19.2 Staging by @wesleytodd in https://github.com/expressjs/express/pull/5561
remove duplicate location test for data uri by @wesleytodd in https://github.com/expressjs/express/pull/5562
feat: document beta releases expectations by @marco-ippolito in https://github.com/expressjs/express/pull/5565
Cut down on duplicated CI runs by @jonchurch in https://github.com/expressjs/express/pull/5564
Add a Threat Model by @UlisesGascon in https://github.com/expressjs/express/pull/5526
Assign captain of encodeurl by @blakeembrey in https://github.com/expressjs/express/pull/5579
Nominate jonchurch as repo captain for http-errors, expressjs.com, morgan, cors, body-parser by @jonchurch in https://github.com/expressjs/express/pull/5587
docs: update Security.md by @inigomarquinez in https://github.com/expressjs/express/pull/5590
docs: update triage nomination policy by @UlisesGascon in https://github.com/expressjs/express/pull/5600
Add CodeQL (SAST) by @UlisesGascon in https://github.com/expressjs/express/pull/5433
docs: add UlisesGascon as triage initiative captain by @UlisesGascon in https://github.com/expressjs/express/pull/5605
Use object with null prototype for various app properties by @EvanHahn in https://github.com/expressjs/express/pull/4861
deps: encodeurl@~2.0.0 by @blakeembrey in https://github.com/expressjs/express/pull/5569
skip QUERY method test by @jonchurch in https://github.com/expressjs/express/pull/5628
ignore ETAG query test on 21 and 22, reuse skip util by @jonchurch in https://github.com/expressjs/express/pull/5639
add support Node.js@22 in the CI by @mertcanaltin in https://github.com/expressjs/express/pull/5627
doc: add table of contents, tc/triager lists to readme by @mertcanaltin in https://github.com/expressjs/express/pull/5619
List and sort all projects, add captains by @blakeembrey in https://github.com/expressjs/express/pull/5653
Call callback once on listen error by @wesleytodd in https://github.com/expressjs/express/pull/3216
docs: add @UlisesGascon as captain for cookie-parser by @UlisesGascon in https://github.com/expressjs/express/pull/5666
✨ bring back query tests for node 21 by @ctcpip in https://github.com/expressjs/express/pull/5690
[v4] Deprecate res.clearCookie accepting options.maxAge and options.expires by @jonchurch in https://github.com/expressjs/express/pull/5672
skip QUERY tests for Node 21 only, still not supported by @jonchurch in https://github.com/expressjs/express/pull/5695
📝 update people, add ctcpip to TC by @ctcpip in https://github.com/expressjs/express/pull/5683
remove minor version pinning from ci by @jonchurch in https://github.com/expressjs/express/pull/5722
Fix link variable use in attribution section of CODE OF CONDUCT by @IamLizu in https://github.com/expressjs/express/pull/5762
Replace Appveyor windows testing with GHA by @jonchurch in https://github.com/expressjs/express/pull/5599
Add OSSF Scorecard badge by @UlisesGascon in https://github.com/expressjs/express/pull/5436
Throw on invalid status codes by @jonchurch in https://github.com/expressjs/express/pull/4212
Use Array.flat instead of array-flatten by @almic in https://github.com/expressjs/express/pull/5677
Adopt Node@18 as the minimum supported version by @UlisesGascon in https://github.com/expressjs/express/pull/5803
Ignore expires and maxAge in res.clearCookie() by @jonchurch in https://github.com/expressjs/express/pull/5792
send@1.0.0 by @wesleytodd in https://github.com/expressjs/express/pull/5786
chore: upgrade debug dep from 3.10 to 4.3.6 by @carpasse in https://github.com/expressjs/express/pull/5829
refactor: replace 'path-is-absolute' dep with node:path isAbsolute method by @carpasse in https://github.com/expressjs/express/pull/5830
update scorecard link by @bjohansebas in https://github.com/expressjs/express/pull/5814
Nominate @IamLizu to the triage team by @UlisesGascon in https://github.com/expressjs/express/pull/5836
deps: path-to-regexp@0.1.8 by @blakeembrey in https://github.com/expressjs/express/pull/5603
docs: specify new instructions for question and discuss by @IamLizu in https://github.com/expressjs/express/pull/5835
5.x: Upgrading merge-descriptors with allowing minors by @RobinTail in https://github.com/expressjs/express/pull/5782
4.x: Upgrade merge-descriptors dependency by @RobinTail in https://github.com/expressjs/express/pull/5781
WIP: serve-static@2 by @wesleytodd in https://github.com/expressjs/express/pull/5790
chore: upgrade qs dp from 6.11.0 to 6.13.0 by @carpasse in https://github.com/expressjs/express/pull/5847
Upgrade cookie signature by @IamLizu in https://github.com/expressjs/express/pull/5833
accepts@2 by @wesleytodd in https://github.com/expressjs/express/pull/5881
mime-types@3 by @wesleytodd in https://github.com/expressjs/express/pull/5882
type-is@^2.0.0 by @wesleytodd in https://github.com/expressjs/express/pull/5883
content-disposition@^1.0.0 by @wesleytodd in https://github.com/expressjs/express/pull/5884
fix(deps): finalhandler@^2.0.0 by @wesleytodd in https://github.com/expressjs/express/pull/5899
path-to-regexp@0.1.10 by @blakeembrey in https://github.com/expressjs/express/pull/5902
update to fresh@^2.0.0 by @jonchurch in https://github.com/expressjs/express/pull/5916
router@^2.0.0 by @wesleytodd in https://github.com/expressjs/express/pull/5885
Adopt Node@18 as the minimum supported version by @UlisesGascon in https://github.com/expressjs/express/pull/5595
master -> 5.0 by @ctcpip in https://github.com/expressjs/express/pull/5785
🔧 update CI, remove unsupported versions, clean up by @ctcpip in https://github.com/expressjs/express/pull/5931
Delete back as a magic string by @blakeembrey in https://github.com/expressjs/express/pull/5933
Release 5.0 by @dougwilson in https://github.com/expressjs/express/pull/2237

New Contributors

@marco-ippolito made their first contribution in https://github.com/expressjs/express/pull/5565
@inigomarquinez made their first contribution in https://github.com/expressjs/express/pull/5590
@mertcanaltin made their first contribution in https://github.com/expressjs/express/pull/5627
@ctcpip made their first contribution in https://github.com/expressjs/express/pull/5690
@IamLizu made their first contribution in https://github.com/expressjs/express/pull/5762
@almic made their first contribution in https://github.com/expressjs/express/pull/5677
@carpasse made their first contribution in https://github.com/expressjs/express/pull/5829
@bjohansebas made their first contribution in https://github.com/expressjs/express/pull/5814
@RobinTail made their first contribution in https://github.com/expressjs/express/pull/5782

Full Changelog: https://github.com/expressjs/express/compare/v5.0.0-beta.3...v5.0.0

4.22.1

What's Changed

[!IMPORTANT]
The prior release (4.22.0) included an erroneous breaking change related to the extended query parser. There is no actual security vulnerability associated with this behavior (CVE-2024-51999 has been rejected). The change has been fully reverted in this release.

Release: 4.22.1 by @UlisesGascon in https://github.com/expressjs/express/pull/6934

Full Changelog: https://github.com/expressjs/express/compare/4.22.0...v4.22.1