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CVE-2026-46342
medium
CVSS 5.4
Cross-Site Scripting (XSS) in nuxt (CVE-2026-46342)
Summary
cross-site scripting in nuxt (CVE-2026-46342). Risk of unauthorized operations or information disclosure. Exploitable via ``props``. Mitigation: upgrade to `4.4.6` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-46342** has been found in nuxt.
Attackers can target a specific entry point like ``props`` over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 5.4/10.
What to do: upgrade nuxt to **4.4.6** or later.
If unsure, ask your IT team or search "nuxt CVE-2026-46342" on the vendor's site.
CVE-2026-46342 (nuxt) — CWE-79 / CVSS v3 5.4
Attack vector: remote (network-reachable) / unauthenticated
Attack surface: `props` / `innerHTML` / `HttpOnly` / `experimental.componentIslands`
Patched: `4.4.6` — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
❓ What is the problem
**Cross-site scripting (XSS)** (CWE-79) exists in nuxt. Attackers reach the vulnerable code path via ``props`` without authentication.
📍 Affected scope
nuxt — . Attack surface: `props` / `innerHTML` / `HttpOnly` / `experimental.componentIslands`.
🔥 Severity
Severity: Medium (CVSS 5.4/10). Risk of unauthorized operations or information disclosure
🔧 How to fix
Update to **4.4.6**.
🛡️ Workaround
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
🔍 Detection
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run `grep -r 'nuxt' .` against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response Actions (7 steps)
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
grep -r 'nuxt' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で `nuxt` を grep し、稼働しているサービス・バージョンを把握する。
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6Apply patch patch
Upgrade nuxt to 4.4.6ステージング環境で 4.4.6 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスと、Step 3 で見つけた異常検知の続報チェックを含めること。
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7Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番では Step 3 と同じログクエリでアラート再発が無いか継続監視。
Affected packages
npm
nuxt
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4.6"}]}]
npm
@nuxt/nitro-server
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4.6"}]}]