CVE-2026-71315highCWE-178 CWE-863

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

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 8.2epss 0.3%

exploitation probability

0.3%top 81% of all CVEs

observed exploitation

nono source reports it

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.

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

Affected products

nuxt · nuxt

References

https://github.com/nuxt/nuxt/commit/619963309e082190bac4a26b05f2dd155b039b81 https://github.com/nuxt/nuxt/commit/ad624a75ad2d215f43633f6b40be346a7194d34d https://github.com/nuxt/nuxt/releases/tag/v3.21.10 https://github.com/nuxt/nuxt/releases/tag/v4.5.1 https://github.com/nuxt/nuxt/security/advisories/GHSA-hxvh-4h3w-prp9