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CVE-2026-71315

HighPublished

Nuxt route rules silently dropped for mixed-case paths, bypassing appMiddleware auth gates (incomplete fix for CVE-2026-53721)

Published: Aug 5, 2026
Updated: Aug 6, 2026
Assigning CNA: GitHub_M
Evidence observed: Aug 29, 2026

Primary CVSS

8.2/ 10High

nvd · CVSS 3.1

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

EPSS probability estimate

0.5%

Low · next 30 days

Percentile: 38.9%
Model date: Oct 17, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

Nuxt is an open-source web development framework for Vue.js. From 3.21.7 until 3.21.10 and 4.5.1, mixed-case routeRules keys can fail to match case-folded lookups when router.options.sensitive is false and drop appMiddleware authorization gates. This is caused by an incomplete fix for CVE-2026-53721. This issue is fixed in 3.21.10 and 4.5.1.

Sources

security-researchPoC
PoCs & write-ups for CVEs I reported (coordinated disclosure; published + patched only)

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