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

October 22, 2026

Nuxt compared routeRules keys against the raw request path, without decoding percent-encoding, while the router decodes parameters when it resolves a route. A request whose path is percent-encoded can therefore resolve to a page while failing to match the route rule meant to protect it, so the rule’s appMiddleware never runs, including during server rendering.

References

  • github.com/advisories/GHSA-6gq8-jgmh-3ffp
  • 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
  • nvd.nist.gov/vuln/detail/CVE-2026-114131

Code Behaviors & Features

Detect and mitigate CVE-2026-114131 with GitLab Dependency Scanning

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Affected versions

All versions starting from 3.11.0 before 3.21.4, all versions starting from 4.0.0 before 4.4.4

Fixed versions

  • 3.21.4
  • 4.4.4

Solution

Upgrade to versions 3.21.4, 4.4.4 or above.

Impact 6.5 MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Learn more about CVSS

Weakness

  • CWE-436: Interpretation Conflict
  • CWE-863: Incorrect Authorization

Source file

npm/nuxt/CVE-2026-114131.yml

Spotted a mistake? Edit the file on GitLab.

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