Sourced from webpack-dev-server's releases.

v5.2.6

Patch Changes

• fix: allow undefined as the Server constructor options argument again (by @​bjohansebas in #5695)

  Restores accepting undefined (defaulting it to {}) for the options argument, so passing a webpack config's optional devServer field type-checks and works as before.

• Protect the built-in state-changing routes (/webpack-dev-server/invalidate and /webpack-dev-server/open-editor) against cross-site request forgery. Requests are now checked with Sec-Fetch-Site (falling back to an Origin/Host comparison when it is absent), so a cross-site page can no longer trigger a rebuild or open a file in the editor. Same-origin requests, user-initiated navigations, and non-browser clients (e.g. curl) are unaffected. (by @​bjohansebas in #5698)

• Handle malformed Host and Origin header values gracefully when validating requests. (by @​bjohansebas in #5699)

v5.2.5

Patch Changes

• Skip the HMR WebSocket path when forwarding upgrade requests to user-defined proxies, so custom proxy WebSocket upgrades are no longer intercepted by the dev server. (by @​bjohansebas in #5680)

v5.2.4

5.2.4 (2026-05-11)

Bug Fixes

• set Cross-Origin-Resource-Policy header to prevent source code theft over HTTP

v5.2.3

5.2.3 (2026-01-12)

Bug Fixes

• add cause for errorObject (#5518) (37b033d)
• compatibility with event target and universal target and lazy compilation (574026c)
• overlay: add ESC key to dismiss overlay (#5598) (f91baa8)
• progress indicator styles (#5557) (41a53a1)
• upgrade selfsigned to v5

v5.2.2

5.2.2 (2025-06-03)

Bug Fixes

• "Overlay enabled" false positive (18e72ee)
• do not crush when error is null for runtime errors (#5447) (309991f)
• remove unnecessary header X_TEST (#5451) (64a6124)
• respect the allowedHosts option for cross-origin header check (#5510) (03d1214)

v5.2.1

5.2.1 (2025-03-26)

... (truncated)

Sourced from webpack-dev-server's changelog.

5.2.6

Patch Changes

• fix: allow undefined as the Server constructor options argument again (by @​bjohansebas in #5695)

  Restores accepting undefined (defaulting it to {}) for the options argument, so passing a webpack config's optional devServer field type-checks and works as before.

• Protect the built-in state-changing routes (/webpack-dev-server/invalidate and /webpack-dev-server/open-editor) against cross-site request forgery. Requests are now checked with Sec-Fetch-Site (falling back to an Origin/Host comparison when it is absent), so a cross-site page can no longer trigger a rebuild or open a file in the editor. Same-origin requests, user-initiated navigations, and non-browser clients (e.g. curl) are unaffected. (by @​bjohansebas in #5698)

• Handle malformed Host and Origin header values gracefully when validating requests. (by @​bjohansebas in #5699)

5.2.5

Patch Changes

• Skip the HMR WebSocket path when forwarding upgrade requests to user-defined proxies, so custom proxy WebSocket upgrades are no longer intercepted by the dev server. (by @​bjohansebas in #5680)

All notable changes to this project will be documented in this file. See standard-version for commit guidelines.

5.2.4 (2026-05-11)

Bug Fixes

• set Cross-Origin-Resource-Policy header to prevent source code theft over HTTP

5.2.3 (2026-01-12)

Bug Fixes

• add cause for errorObject (#5518) (37b033d)
• compatibility with event target and universal target and lazy compilation (574026c)
• overlay: add ESC key to dismiss overlay (#5598) (f91baa8)
• progress indicator styles (#5557) (41a53a1)
• upgrade selfsigned to v5

5.2.2 (2025-06-03)

Bug Fixes

• "Overlay enabled" false positive (18e72ee)
• do not crush when error is null for runtime errors (#5447) (309991f)
• remove unnecessary header X_TEST (#5451) (64a6124)
• respect the allowedHosts option for cross-origin header check (#5510) (03d1214)

5.2.1 (2025-03-26)

Security

... (truncated)

• 8a37b0e chore(release): new release (#5697)
• f21ed0f fix: handle malformed Host and Origin headers (#5699)
• 80cd9ee fix: reject cross-site requests to open-editor and invalidate endpoints (#5698)
• 308e853 fix: handle undefined options in Server constructor (#5695)
• 8b2b915 chore: update branch references from v4 to v5 in workflow configuration
• 870ed22 chore: add v5 branch to release workflow triggers
• c3ee325 chore(release): new release (#5682)
• 60173be feat: add changeset validation and release workflow (#5680)
• 948d5e6 fix(proxy): match the HMR upgrade path exactly like the ws server (#5678)
• 93e8996 fix: skip HMR websocket path when forwarding upgrades to user-defined proxies...
• Additional commits viewable in compare view

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