Nuxt: Colliding island props can share one `/__nuxt_island` path (incomplete fix for CVE-2026-46342)

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-128076
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-13 18:17:37 UTC
Updated2026-11-13 18:17:37 UTC
DescriptionNuxt is an open-source web development framework for Vue.js. From 3.21.6 to before 4.0.0 and from 4.4.6 until 4.6.4, the /__nuxt_island path hash uses ohash serialization that does not escape quotes in string values or delimiters in object keys, allowing different island-prop tuples to produce the same path. For prerendering, substituted content is written into the generated page only if the crawler reaches a colliding URL before rendering the page with the legitimate props. Separately, a CDN or reverse proxy that keys island responses by path alone can be primed with the colliding response. If the substituted prop reaches v-html, innerHTML, or another unsafe HTML sink, the response can execute script in the application origin; otherwise the impact is content substitution. Applications that do not use server components or NuxtIsland, islands without attacker-influenced string props, and responses not cached by path alone are unaffected. This issue is fixed in version 4.6.4.

Risk And Classification

Primary CVSS: v3.1 3.1 LOW from [email protected]

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

Problem Types: CWE-116 | CWE-349 | CWE-116 CWE-116: Improper Encoding or Escaping of Output | CWE-349 CWE-349: Acceptance of Extraneous Untrusted Data With Trusted Data

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary3.1LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
3.1CNADECLARED3.1LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Nuxt Nuxt affected >= 3.21.6, < 4.0.0 Not specified
CNA Nuxt Nuxt affected >= 4.4.6, < 4.6.4 Not specified
CNA @nuxt Nitro-server affected >= 3.21.6, < 4.0.0 Not specified
CNA @nuxt Nitro-server affected >= 4.4.6, < 4.6.4 Not specified

References

ReferenceSourceLinkTags
github.com/nuxt/nuxt/releases/tag/v4.6.4 [email protected] github.com
github.com/nuxt/nuxt/security/advisories/GHSA-hf59-9xwc-2g4p [email protected] github.com
github.com/nuxt/nuxt/commit/6f1b93c643355688bc9e2d7434723f7fd3f25092 [email protected] github.com
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