Nuxt: Route rules are matched against the raw request path, so a percent-encoded segment can bypass `appMiddleware` on dynamic and catch-all routes

[ Description ]Official description

Nuxt is an open-source web development framework for Vue.js. From 3.11.0 until 3.21.4 and 4.4.4, Nuxt compares route-rule keys with the raw request path while route resolution decodes dynamic and catch-all parameters, allowing a percent-encoded segment to resolve to a protected page without matching the routeRules entry intended for that path. As a result, appMiddleware can be skipped during server rendering and an unauthenticated requester can receive the gated page and its SSR data. The same mismatch affects app-manifest rules including redirect, appLayout, ssr, prerender, and payload flags derived from cache, isr, and swr. This vulnerability is fixed in 4.4.4 and 3.21.4.

[ Fixes ]Fixes and patches

• nuxt 4.4.4Fixed version · GitHub Advisories · npm package nuxt: upgrade to 4.4.4 or later (affected >= 4.0.0, < 4.4.4)
• nuxt 3.21.4Fixed version · GitHub Advisories · npm package nuxt: upgrade to 3.21.4 or later (affected >= 3.11.0, < 3.21.4)

[ Packages ]Affected open-source packages

• nuxt npmAffected >= 4.0.0, < 4.4.4 · fixed in 4.4.4 · GHSA-6gq8-jgmh-3ffp
• nuxt npmAffected >= 3.11.0, < 3.21.4 · fixed in 3.21.4 · GHSA-6gq8-jgmh-3ffp

[ References ]References

• github.com/nuxt/nuxt/commit/81f86ac5ee82bb1a9b887e59f3bc84624d711497
• github.com/nuxt/nuxt/commit/9123ed850c468a7424a868c20d0d49a5507d32e5
• github.com/nuxt/nuxt/releases/tag/v3.21.11
• github.com/nuxt/nuxt/releases/tag/v4.5.2
• github.com/nuxt/nuxt/security/advisories/GHSA-6gq8-jgmh-3ffp