# CVE-2026-53721

## Summary

- **CVE ID:** CVE-2026-53721
- **Severity:** HIGH
- **CVSS Score:** 8.8 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-178, CWE-863
- **Published:** Jun 12, 2026
- **Last Modified:** Jun 13, 2026

## Description

Nuxt is an open-source web development framework for Vue.js. From versions 3.11.0 to before 3.21.7 and 4.0.0 to before 4.4.7, there is a route-rule middleware bypass via case-sensitivity mismatch between vue-router and the routeRules matcher. This issue has been patched in versions 3.21.7 and 4.4.7.

## Affected Products

- nuxt — nuxt (>= 3.11.0, < 3.21.7)
- nuxt — nuxt (>= 4.0.0, < 4.4.7)

## References

- [CNA](https://github.com/nuxt/nuxt/security/advisories/GHSA-mm7m-92g8-7m47)
- [CNA](https://github.com/nuxt/nuxt/commit/07e39cd6f26e407b4192b7865bd17bc44536b9bb)
- [CNA](https://github.com/nuxt/nuxt/commit/3f3e3fa7b5eec8e495f4f8ce0a54813a8875a11e)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.40%
- **EPSS Percentile:** 33.2

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._