vercel/next.js: The React Framework

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If you're ready to tackle some open issues, we've collected some good first issues for you.

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`"use cache"`'d components do not update during HMR inside an iFrame

Bug

#90143

· rikbrown opened

on Feb 19, 2026

CSS Media Query Compilation Issue

CSS

Bug

#90133

· dlouhak opened

on Feb 18, 2026

Locale detection isn't working correctly after the update from 15.3 to 15.4/15.5 if a domains array is present in next.config

Internationalization (i18n)

Pages Router

Bug

#90131

· EKjs opened

on Feb 18, 2026

Sourcemaps broken for next/dist files in Yarn PnP mode (webpack)

SWC

Webpack

Bug

#90129

· WooWan opened

on Feb 18, 2026

SegmentViewNode produces "unique key" error when passing shared object reference

Bug

#90099

· ceolinwill opened

on Feb 18, 2026

500 error instead of 404 when answering a POST request with form data

Server Actions

Bug

#90090

· vinassefranche opened

on Feb 18, 2026

Parallel routes breaks typed routes

Parallel & Intercepting Routes

TypeScript

Webpack

Bug

#90055

· mordechaim opened

on Feb 17, 2026

Router Cache misses on every navigation when Link href includes search params (15.x)

Linking and Navigating

Bug

#90008

· Elusive7733 opened

on Feb 15, 2026

`next build` shows generic "Invalid segment configuration export detected" when `config.matcher` uses `String.raw` in `proxy.ts`

Middleware

Turbopack

Bug

#89937

· ahxar opened

on Feb 13, 2026

`default.js` does not trigger sibling `layout.js`

Parallel & Intercepting Routes

Bug

#89920

· amannn opened

on Feb 13, 2026

The `.next/standalone/` output folder doesn't contain any sourcemaps

Output

Bug

#89917

· afgomez opened

on Feb 12, 2026

data:text/css imports fail in Pages Router with Turbopack

#89900

· jantimon opened

on Feb 12, 2026

Middleware rewrite: internal request URL re-serialized incorrectly so query param value containing & is split

Middleware

Bug

#89879

· DanielGiljam opened

on Feb 12, 2026

Turbopack serverExternalPackages: relative symlinks in .next/node_modules break in multi-stage Docker builds

Module Resolution

Output

Turbopack

#89851

· kyeb opened

on Feb 12, 2026

Webpack production build includes ~840KB of dev-only Next.js Devtools modules when using certain Browserslist configs

Webpack

Bug

#89844

· AndreiBalan-dev opened

on Feb 12, 2026

broken css url when used "asset" rule type

CSS

Bug

#89828

· megastels opened

on Feb 11, 2026

Turbopack disables PropertyLiterals and MemberExpressionLiterals ES3 transforms, breaking Safari 15 strict mode

SWC

Turbopack

Bug

#89808

· jesseproudman opened

on Feb 11, 2026

agents-md does not detect version properly if ranges are used

Bug

#89773

· emonty opened

on Feb 11, 2026

agents-md provides non-working command in AGENTS.md instructions

Bug

#89772

· emonty opened

on Feb 11, 2026

Adding proxy causes requests to _next/data which return empty data

Middleware

Pages Router

Bug

#89768

· ari-party opened

on Feb 10, 2026

[ESLint v10]: TypeError: contextOrFilename.getFilename is not a function when running ESLint v10

linear: next

Linting

Bug

#89764

· bennajah opened

on Feb 10, 2026

Nonce-based CSP with inline <head> scripts is incompatible with cacheComponents

Bug

#89754

· r34son opened

on Feb 10, 2026

Webpack cache warning from `@next/mdx` during `next build` with MDX in App Router

Webpack

Bug

#89753

· pieterjanscheir opened

on Feb 10, 2026

Excessive layout client component child rendering while waiting for page client component

React

Bug

#89654

· hdodov opened

on Feb 8, 2026

Webpack mangles `@import ... supports(...)` syntax when inlining CSS

CSS

Webpack

Bug

#89602

· robert-j-webb opened

on Feb 6, 2026

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👋 Want to contribute to vercel/next.js?

`"use cache"`'d components do not update during HMR inside an iFrame

CSS Media Query Compilation Issue

Locale detection isn't working correctly after the update from 15.3 to 15.4/15.5 if a domains array is present in next.config

Sourcemaps broken for next/dist files in Yarn PnP mode (webpack)

SegmentViewNode produces "unique key" error when passing shared object reference

500 error instead of 404 when answering a POST request with form data

Parallel routes breaks typed routes

Router Cache misses on every navigation when Link href includes search params (15.x)

`next build` shows generic "Invalid segment configuration export detected" when `config.matcher` uses `String.raw` in `proxy.ts`

`default.js` does not trigger sibling `layout.js`

The `.next/standalone/` output folder doesn't contain any sourcemaps

data:text/css imports fail in Pages Router with Turbopack

Middleware rewrite: internal request URL re-serialized incorrectly so query param value containing & is split

Turbopack serverExternalPackages: relative symlinks in .next/node_modules break in multi-stage Docker builds

Webpack production build includes ~840KB of dev-only Next.js Devtools modules when using certain Browserslist configs

broken css url when used "asset" rule type

Turbopack disables PropertyLiterals and MemberExpressionLiterals ES3 transforms, breaking Safari 15 strict mode

agents-md does not detect version properly if ranges are used

agents-md provides non-working command in AGENTS.md instructions

Adding proxy causes requests to _next/data which return empty data

[ESLint v10]: TypeError: contextOrFilename.getFilename is not a function when running ESLint v10

Nonce-based CSP with inline <head> scripts is incompatible with cacheComponents

Webpack cache warning from `@next/mdx` during `next build` with MDX in App Router

Excessive layout client component child rendering while waiting for page client component

Webpack mangles `@import ... supports(...)` syntax when inlining CSS

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👋 Want to contribute to vercel/next.js?

Issues

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