What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-21 · updated 2026-10-30
• Weakness: CWE-436

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.

Affected products

• nuxt: from 4.0.0, < 4.4.4; from 3.11.0, < 3.21.4

References

• 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
• https://github.com/nuxt/nuxt/security/advisories/GHSA-6gq8-jgmh-3ffp

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