Is CVE-2026-46342 in the CISA KEV catalog?

No. CVE-2026-46342 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-46342?

CVE-2026-46342 has a CVSS v3 base score of 5.4 (MEDIUM).

What is the EPSS score for CVE-2026-46342?

CVE-2026-46342 has an EPSS score of 0.09% (1th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-46342?

Upgrade nuxt to 4.4.5 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2026-46342

MEDIUM

5.4

CVSS v3

NVD

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.

CWE-79Cross-Site Scripting (XSS)CWE-349 CWE-444

How to fix

Remediation Available

nuxtNVD

Affected:>= 4.0.0, < 4.4.5Fixed in:4.4.5CVE-2026-46342derived from NVD

nuxt\/nitro-serverNVD

Affected:>= 4.2.0, < 4.4.6Fixed in:4.4.6CVE-2026-46342derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Exploit Intelligence

0.09%probability of exploitation in 30 days

1stpercentile

Low risk: more likely to be exploited than 1% of all known CVEs.

References

Patch1

github.com

Issue Tracking1

github.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-15.