Nuxt: Route-rule middleware bypass via case-sensitivity mismatch between vue-router and the routeRules matcher
CVE-2026-53721

8.8HIGH

Key Information:

Vendor

Nuxt

Status
Nuxt
Vendor
CVE Published:
12 June 2026

What is CVE-2026-53721?

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 Version(s)

nuxt >= 3.11.0, < 3.21.7 < 3.11.0, 3.21.7

nuxt >= 4.0.0, < 4.4.7 < 4.0.0, 4.4.7

References

https://github.com/nuxt/nuxt/security/advisories/GHSA-mm7...
x_refsource_CONFIRM
https://github.com/nuxt/nuxt/commit/07e39cd6f26e407b4192b...
x_refsource_MISC
https://github.com/nuxt/nuxt/commit/3f3e3fa7b5eec8e495f4f...
x_refsource_MISC

CVSS V4

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.