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Nuxt dot segments bypass server middleware and route rules on page routes

Priority LOW 35CWE-41Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
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-863.

Summary

Nuxt resolves literal or percent-encoded dot segments before rendering a page, while Nitro routing, server/middleware checks and server route rules evaluate the unresolved path. A request such as /%2e/admin can render app/pages/admin.vue and its server-rendered data, so checks keyed to /admin, redirects and per-route security headers do not apply. Versions from 4.6.0 before 4.6.3 are affected, and exploitation requires a client that sends dot segments without browser normalization. API handlers, appMiddleware, Nuxt 3 and Nuxt 4.0.0 through 4.5.x are not affected.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

Description from the CNA

Nuxt is an open-source web development framework for Vue.js. From 4.6.0 until 4.6.3, Nuxt resolves literal or percent-encoded dot segments before rendering a page while Nitro routing, server/middleware checks, and server route rules evaluate the unresolved path. A request such as /%2e/admin can therefore render app/pages/admin.vue and its server-rendered data while checks keyed to /admin, redirects, or per-route security headers do not apply. API handlers, appMiddleware, Nuxt 3, and Nuxt 4.0.0 through 4.5.x are not affected, and exploitation requires a client that sends dot segments without browser normalization. This issue is fixed in version 4.6.3.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00339 27th percentileScored 2026-11-07
Fix Fixed nuxt (nuxt): 4.6.3nitro-server (@nuxt): 4.6.3+2 more products

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
nuxtnuxt4.6.0 to before 4.6.34.6.3Patch availableCNA
nuxtnitro-server4.6.0 to before 4.6.34.6.3Patch availableCNA
—nuxt (npm)4.6.0 to before 4.6.34.6.3Patch availableGHSA-9v7c-q64q-vv33
—@nuxt/nitro-server (npm)4.6.0 to before 4.6.34.6.3Patch availableGHSA-9v7c-q64q-vv33
  • nuxt Vendornuxt Affected 4.6.0 to before 4.6.3 Fixed in 4.6.3 Patch available CNA
  • nitro-server Vendornuxt Affected 4.6.0 to before 4.6.3 Fixed in 4.6.3 Patch available CNA
  • nuxt (npm) Vendor— Affected 4.6.0 to before 4.6.3 Fixed in 4.6.3 Patch available GHSA-9v7c-q64q-vv33
  • @nuxt/nitro-server (npm) Vendor— Affected 4.6.0 to before 4.6.3 Fixed in 4.6.3 Patch available GHSA-9v7c-q64q-vv33

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:nuxt:nuxt:*:*:*:*:*:*:*:*——nuxt
  • cpe:2.3:a:nuxt:nuxt:*:*:*:*:*:*:*:* Versions — — ·nuxt

Remediation

Upgrade nuxt and @nuxt/nitro-server to version 4.6.3.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

  • Fix · CNA nuxt (nuxt) Fixed in 4.6.3
  • Fix · CNA nitro-server (@nuxt) Fixed in 4.6.3
  • Fix · GHSA-9v7c-q64q-vv33 nuxt (npm) Fixed in 4.6.3 Advisory →
  • Fix · GHSA-9v7c-q64q-vv33 @nuxt/nitro-server (npm) Fixed in 4.6.3 Advisory →

Timeline

  1. 2026-10-29 Threatist record created from CVE-2026-119200
  2. 2026-10-30 Alias added: GHSA-9v7c-q64q-vv33
  3. 2026-10-30 Fix available: npm/@nuxt/[email protected], npm/[email protected] · GHSA-9v7c-q64q-vv33
  4. 2026-10-30 CVSS score added · GHSA-9v7c-q64q-vv33
  5. 2026-10-30 Weakness changed · GHSA-9v7c-q64q-vv33
  6. 2026-10-30 5 new references · GHSA-9v7c-q64q-vv33
  7. 2026-10-31 Priority changed: MEDIUM → LOW
  8. 2026-11-04 CISA SSVC decision points changed

References

  • 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
See all 44 →

Sources