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CVE-2026-46342

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

Published: Jun 12, 2026Updated: Jun 15, 2026 Sources: CVE List NVDCWE-79
5.4MEDIUM
NVD MITRE
EPSS Score
0.1%
Top 99.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Workaround Only
Self-Check
Not available

Description

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:UC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-79CWE-349CWE-444

Affected Products

nuxt
oss-projectaka nuxt.js, nuxt/framework
nuxtLibrary
OSS Libraries / web-framework
nuxt\/nitro-serverLibrary
OSS Libraries / web-framework

Exploitability

Workaround Available

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

3 techniques
Collection
Execution
Initial Access
View detailed technique mapping

References

https://github.com/nuxt/nuxt/security/advisories/GHSA-g8wj-3cr3-6w7v
github.com
https://github.com/nuxt/nuxt/pull/35077
github.com
News mentions
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