Nuxt server islands render unsanitized useHeadSafe input
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.
Summary
Nuxt, an open-source Vue.js framework, is affected from 3.13.0 before 4.6.2. The server-island renderer serializes raw useHeadSafe input without keeping its safe-input marker, so NuxtIsland inserts that input into the page head as an ordinary entry, which enables cross-site scripting (CWE-79). An attacker who can supply data passed to useHeadSafe in a server component or a component rendered through NuxtIsland can store script in the application origin, and a user must interact with the page for it to run.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Description from the CNA
Nuxt is an open-source web development framework for Vue.js. From 3.13.0 until 4.6.2, the server-island renderer serializes raw useHeadSafe entry input into the island response without preserving the safe-input marker, and NuxtIsland later inserts that input into the page head as an ordinary entry. An application that passes attacker-controlled data to useHeadSafe in a .server.vue component or page, or in a component rendered through NuxtIsland, can therefore render values normally removed by the allowlist, including event-handler attributes or executable script content, resulting in stored cross-site scripting in the application origin. This issue is fixed in version 4.6.2 .
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| nuxt | nuxt | 3.13.0 to before 4.6.2 | 4.6.2 | Patch available | CNA |
| — | nuxt (npm) | 3.13.0 to before 4.6.2 | 4.6.2 | Patch available | GHSA-xfq5-w38q-pc2x |
- nuxt Vendornuxt Affected 3.13.0 to before 4.6.2 Fixed in 4.6.2 Patch available CNA
- nuxt (npm) Vendor— Affected 3.13.0 to before 4.6.2 Fixed in 4.6.2 Patch available GHSA-xfq5-w38q-pc2x
Remediation
Upgrade the nuxt npm package to version 4.6.2, the listed fixed version.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
- Fix · CNA nuxt (nuxt) Fixed in 4.6.2
- Fix · GHSA-xfq5-w38q-pc2x nuxt (npm) Fixed in 4.6.2 Advisory →
Timeline
- 2026-10-21 Threatist record created from CVE-2026-114133
- 2026-10-22 Alias added: GHSA-xfq5-w38q-pc2x
- 2026-10-22 Fix available: npm/[email protected] · GHSA-xfq5-w38q-pc2x
- 2026-10-22 CVSS score added · GHSA-xfq5-w38q-pc2x
- 2026-10-22 Weakness changed · GHSA-xfq5-w38q-pc2x
- 2026-10-22 5 new references · GHSA-xfq5-w38q-pc2x
- 2026-10-23 Priority changed: MEDIUM → LOW
- 2026-10-28 CISA SSVC decision points changed
References
More nuxt vulnerabilities
- TI-2023-03020 Code Injection in nuxt/nuxt CVSS 3.1CRITICAL 9.8
- TI-2024-28339 Server-Side Request Forgery (SSRF) in nuxt-icon CVSS 3.1HIGH 8.6
- TI-2024-22685 Remote code execution via the browser when running the test locally in nuxt CVSS 3.1HIGH 8.8
- TI-2026-26689 Nuxt OG Image vulnerable to DoS via image generation CVSS 4.0MEDIUM 6.9
- TI-2022-04037 Cross-site Scripting (XSS) - DOM in nuxt/framework CVSS 3.1MEDIUM 6.1
- TI-2022-04036 Cross-site Scripting (XSS) - Reflected in nuxt/framework CVSS 3.1MEDIUM 6.1
Sources
- CVE-2026-114133 · CVE Program
- CVE-2026-114133 · NVD
- FIRST EPSS
- GHSA-xfq5-w38q-pc2x · GitHub Advisory Database · CC BY 4.0
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