CVE-2026-46342CWE-349CWE-444CWE-79

Nuxt: `__nuxt_island` endpoint does not bind responses to request props, enabling shared-cache poisoning

Low · published June 12, 2026

CVSS v4.0
2.3
EPSS
0%
Percentile
2.5
In the wild
Unconfirmed
What it is

Nuxt is an open-source web development framework for Vue.js. In Nuxt versions 3.1.0 to before 3.21.6 and 4.0.0-alpha.1 to before 4.4.6 and @nuxt/nitro-server versions 3.20.0 to before 3.21.6 and 4.0.0-alpha.1 to before 4.4.6, the /__nuxt_island/* endpoint accepts attacker-controlled props query/body parameters and renders any island component without verifying that the URL-resident hash (<Name>_<hashId>.json) was actually issued for those inputs by <NuxtIsland>. The hash is computed and embedded client-side but never validated server-side, so the same path can return materially different responses depending on the query. This issue has been patched in versions 3.21.6 and 4.4.6.

The record
Technical detail
CVSS v4.0
2.3 · LOW
Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
EPSS
0.00132 · 2.5th percentile
Weaknesses
CWE-349 · Acceptance of Extraneous Untrusted Data With Trusted Data; CWE-444 · Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling'); CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-06-12T12:50Z
EPSS history
Timeline
  • 12 JUN 12:50Z
    Nuxt: `__nuxt_island` endpoint does not bind responses to request props, enabling shared-cache poisoning
    cvelistv5