CVE-2026-71318

Nuxt: Unauthorized Component Instantiation via Server Island Props

MEDIUM
4.8
CVSS Score
Published: August 5, 2026 at 09:21 PM UTC
Updated: September 8, 2026 at 09:09 PM UTC
1 product affected across 1 vendorNuxt

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Severity
MEDIUM4.8
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 3.21.10v < 4.5.1
Affected range stops below 3.21.10, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.5.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (3)

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.8MEDIUMGitHub_M
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-20

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