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fix(nextjs): Don't prepend basePath to absolute router navigation URLs - #24680

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fix/nextjs-basepath-absolute-url
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fix/nextjs-basepath-absolute-url

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@Lms24

@Lms24 Lms24 commented Sep 24, 2026 •

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This PR fixes a bug where a potentially set basePath would be preprended to absolute URL router pushes, resulting in incorrect navigation spans. This is done by hardening the check whether to apply the basePath or not.

Fixes #24672

Only root-relative hrefs get the basePath prefix, mirroring Next.js' own addPathPrefix. Previously, absolute URLs passed to router.push/replace (e.g. from a redirect() to an absolute URL) produced span names like /my-apphttp://host/login.

Fixes #24672

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
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github-actions Bot commented Sep 24, 2026 •

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size-limit report 📦

Path Size % Change Change
@sentry/browser 29.24 kB - -
@sentry/browser - with treeshaking flags 27.5 kB - -
@sentry/browser - with treeshaking flags tracing without tracing 27.4 kB - -
@sentry/browser (incl. Tracing) 51.15 kB - -
@sentry/browser (incl. Tracing + Span Streaming) 51.17 kB - -
@sentry/browser (incl. Tracing, Profiling) 54.18 kB - -
@sentry/browser (incl. Tracing, Replay) 90.76 kB - -
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags 79.86 kB - -
@sentry/browser (incl. Tracing, Replay with Canvas) 95.46 kB - -
@sentry/browser (incl. Tracing, Replay, Feedback) 108.41 kB - -
@sentry/browser (incl. Feedback) 46.76 kB - -
@sentry/browser (incl. sendFeedback) 34.3 kB - -
@sentry/browser (incl. FeedbackAsync) 39.41 kB - -
@sentry/browser (incl. Metrics) 30.25 kB - -
@sentry/browser (incl. Logs) 30.51 kB - -
@sentry/browser (incl. Metrics & Logs) 31.18 kB - -
@sentry/react 31 kB - -
@sentry/react (incl. Tracing) 53.45 kB - -
@sentry/vue 36.74 kB - -
@sentry/vue (incl. Tracing) 53.7 kB - -
@sentry/svelte 29.26 kB - -
CDN Bundle 30.93 kB - -
CDN Bundle (incl. Tracing) 51.69 kB - -
CDN Bundle (incl. Logs, Metrics) 33.2 kB - -
CDN Bundle (incl. Tracing, Logs, Metrics) 53.66 kB - -
CDN Bundle (incl. Replay, Logs, Metrics) 73.92 kB - -
CDN Bundle (incl. Tracing, Replay) 89.28 kB - -
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) 91.25 kB - -
CDN Bundle (incl. Tracing, Replay, Feedback) 95.45 kB - -
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) 97.42 kB - -
CDN Bundle - uncompressed 91.4 kB - -
CDN Bundle (incl. Tracing) - uncompressed 153.77 kB - -
CDN Bundle (incl. Logs, Metrics) - uncompressed 97.97 kB - -
CDN Bundle (incl. Tracing, Logs, Metrics) - uncompressed 159.73 kB - -
CDN Bundle (incl. Replay, Logs, Metrics) - uncompressed 227.54 kB - -
CDN Bundle (incl. Tracing, Replay) - uncompressed 273.5 kB - -
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) - uncompressed 279.44 kB - -
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed 287.2 kB - -
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) - uncompressed 293.13 kB - -
@sentry/nextjs (client) 55.78 kB +0.02% +6 B 🔺
@sentry/sveltekit (client) 51.59 kB - -
@sentry/core/server 39.95 kB - -
@sentry/core/browser 13.63 kB - -
@sentry/node 133.88 kB +0.01% +8 B 🔺
@sentry/node/import (ESM hook with diagnostics-channel injection) 82.4 kB - -
@sentry/node - without tracing 90.43 kB +0.02% +16 B 🔺
@sentry/node - without channel injection 112.41 kB +0.01% +11 B 🔺
@sentry/aws-serverless 98.7 kB +0.01% +8 B 🔺
@sentry/cloudflare (withSentry) - minified 206.49 kB - -
@sentry/cloudflare (withSentry) 513.73 kB - -

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@Lms24
Lms24 force-pushed the fix/nextjs-basepath-absolute-url branch from 8b0b2ae to 5f9e86e Compare September 24, 2026 10:04
@Lms24 Lms24 self-assigned this Sep 24, 2026
@Lms24
Lms24 marked this pull request as ready for review September 24, 2026 10:07
@Lms24
Lms24 requested a review from a team as a code owner September 24, 2026 10:07
@Lms24
Lms24 requested review from chargome and nicohrubec and removed request for a team September 24, 2026 10:07

@chargome chargome left a comment

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Thanks for fixing!

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Next.js: basePath is concatenated onto absolute router.push hrefs, corrupting navigation transaction names

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