Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') Affecting nuxt package, versions >=3.1.0 <3.21.10>=4.0.0 <4.5.1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-NUXT-18565118
- published6 Aug 2026
- disclosed5 Aug 2026
- creditUnknown
Introduced: 5 Aug 2026
NewCVE-2026-71318 (opens in a new tab)How to fix?
Upgrade nuxt to version 3.21.10, 4.5.1 or higher.
Overview
Affected versions of this package are vulnerable to Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') via the as prop in server island components that forward attacker-controlled values into dynamic component resolution. An attacker can instantiate any globally-registered Vue component or native HTML element by supplying a crafted value, potentially leading to unauthorized access or manipulation of application behavior.
Note: This is only exploitable if a server island component forwards untrusted input into a dynamic component path, either explicitly or via attribute fallthrough when the island's root is a polymorphic component.
Workaround
This vulnerability can be mitigated by declaring the props an island accepts, setting inheritAttrs: false on the component, avoiding forwarding untrusted props into dynamic component resolution, and mapping untrusted discriminators through a closed allowlist of imported component definitions instead of passing the raw prop value.