# CVE-2026-128076: Nuxt: Colliding island props can share one `/__nuxt_island` path (incomplete fix for CVE-2026-46342)

Status: published. Published: 2026-11-13. Updated: 2026-11-13.

Nuxt 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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- nuxt / nuxt: >= 3.21.6, < 4.0.0 (affected); >= 4.4.6, < 4.6.4 (affected). Source: CNA: GitHub_M
- @nuxt / nitro-server: >= 3.21.6, < 4.0.0 (affected); >= 4.4.6, < 4.6.4 (affected). Source: CNA: GitHub_M

## Severity and prioritization

- CVSS 3.1: 3.1 (low); CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N; source: CNA: GitHub_M

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-116, CWE-349

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/nuxt/nuxt/security/advisories/GHSA-hf59-9xwc-2g4p (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/nuxt/nuxt/commit/6f1b93c643355688bc9e2d7434723f7fd3f25092 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/nuxt/nuxt/releases/tag/v4.6.4 (CNA: GitHub_M; x_refsource_MISC)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-128076; retrieved 2026-11-13; source updated 2026-11-13

Revision: cfe5427d1333fcdf9c2813d8dc85eef17d4d637b1eee0c0063d96925cd08aa1d

Canonical: https://y2.dev/cve/CVE-2026-128076

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