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Fencer Intel
medium 6.5

CVE-2026-128071 json

Nuxt: Incomplete fix for GHSA-6gq8-jgmh-3ffp: an encoded slash (`%2F`) in the request path bypasses route rules on catch-all page routes

published 12d ago modified yesterday also EUVD-2026-125622 , GHSA-f3x9-2chm-73c8

Unreviewed: the maintainers' own advisory

Published by the maintainers on their GitHub repository nuxt/nuxt. GitHub has not reviewed it into the GitHub Advisory Database, so the affected packages and versions are the maintainers' word. Read the full advisory on GitHub.

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 19%
public exploits
0
none known

Summary

Nuxt is an open-source web development framework for Vue.js. Nuxt from 3.0.0 until 4.6.4, @nuxt/nitro-server from 3.20.0 until 4.6.4, and @nuxt/vite-server from 4.6.0 until 4.6.4, routeRules matching leaves an encoded slash (%2F) in the request path while a catch-all page such as app/pages/[...slug].vue or a custom multi-segment page route decodes it into a route parameter. The getRouteRules result is therefore incomplete, and an unauthenticated request can render the page without the redirect, headers, proxy, SSR, noScripts, appMiddleware, or appLayout rules configured for the decoded path. Protected content is resolved only when the page interprets the decoded parameter accordingly: a custom multi-segment parameter can contain the decoded path, while a repeatable catch-all must join the slash-containing array element; route.path remains encoded and does not resolve that resource. Static pages, single-segment parameters, server/api handlers, and server/routes handlers are not affected because they do not have the same encoded-path mismatch. This issue is fixed in version 4.6.4.

Patch / fix

  • npm nuxt 4.6.4
  • npm @nuxt/nitro-server 4.6.4
  • npm @nuxt/vite-server 4.6.4

Is CVE-2026-128071 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Exploit prediction

0.27% chance of exploitation in the next 30 days, higher than 19% of all scored CVEs (FIRST EPSS, 2026-11-14).

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
npm nuxt
>=4.0.0, <4.6.4
>=3.0.0, <4.0.0
4.6.4
npm @nuxt/nitro-server
>=4.2.0, <4.6.4
>=3.20.0, <4.0.0
4.6.4
npm @nuxt/vite-server
>=4.6.0, <4.6.4
4.6.4

Affected products

  • nuxt nuxt
  • @nuxt nitro-server
  • @nuxt vite-server

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

The maintainers of nuxt/nuxt published their own advisory on GitHub. Reviewed sources take precedence over it.