Vulnerability · Published Aug 5, 2026 · Assigned by GitHub_M

CVE-2026-71318Nuxt: Unauthorized Component Instantiation via Server Island Props

Medium 4.8

In plain English

A medium-severity improper input validation in nuxt from nuxt. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 25% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)4.8Medium

Exploit odds (30 days)0.3%top 75.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Nuxt is an open-source web development framework for Vue.js. From 3.1.0 until 3.21.10 and 4.5.1, an attacker can supply a top-level `as` prop to the /__nuxt_island/ endpoint and drive dynamic component resolution through <component :is>, resolveDynamicComponent, or h(). This issue is fixed in 3.21.10 and 4.5.1.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	nuxt	4.5.1	GHSA-48hr-524c-v5w3
npm	nuxt	3.21.10	GHSA-48hr-524c-v5w3

Affected products (as reported)

Vendor	Product	Versions
nuxt	nuxt	>= 4.0.0, < 4.5.1>= 3.1.0, < 3.21.10

Weakness: CWE-20 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

References

https://github.com/nuxt/nuxt/security/advisories/GHSA-48hr-524c-v5w3 x_refsource_CONFIRM
https://github.com/nuxt/nuxt/releases/tag/v3.21.10 x_refsource_MISC
https://github.com/nuxt/nuxt/releases/tag/v4.5.1 x_refsource_MISC