Medium severity · published Aug 5, 2026
CVE-2026-71318
Nuxt: Unauthorized Component Instantiation via Server Island Props
4.8
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 24% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NU
nuxt · nuxt
>= 4.0.0, < 4.5.1; >= 3.1.0, < 3.21.10 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-71318
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-71318
github.com
https://github.com/nuxt/nuxt/releases/tag/v3.21.10
github.com
https://github.com/nuxt/nuxt/releases/tag/v4.5.1
github.com
https://github.com/nuxt/nuxt/security/advisories/GHSA-48hr-524c-v5w3
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