← Back
CVE-2026-45707
high
CVSS 8.1
Vulnerability in n8n-mcp (CVE-2026-45707)
Summary
vulnerability in n8n-mcp (CVE-2026-45707). Confidential information can be exposed externally. Exploitable via ``N8N_API_URL``. Mitigation: upgrade to `2.51.2` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-45707** has been found in n8n-mcp.
Attackers can target a specific entry point like ``N8N_API_URL`` over the network to misuse the product.
Confidential information can be exposed externally. CVSS score: 8.1/10.
What to do: upgrade n8n-mcp to **2.51.2** or later.
If unsure, ask your IT team or search "n8n-mcp CVE-2026-45707" on the vendor's site.
CVE-2026-45707 (n8n-mcp) — CWE-284 / CVSS v3 8.1
Attack vector: remote (network-reachable) / no user interaction
Attack surface: `N8N_API_URL` / `N8N_API_KEY` / `ENABLE_MULTI_TENANT` / `false`
Patched: `2.51.2` — 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
**A vulnerability** (CWE-284) exists in n8n-mcp. Attackers reach the vulnerable code path via ``N8N_API_URL`` without authentication.
📍 Affected scope
n8n-mcp — . Attack surface: `N8N_API_URL` / `N8N_API_KEY` / `ENABLE_MULTI_TENANT` / `false`.
🔥 Severity
Severity: High (CVSS 8.1/10). Confidential information can be exposed externally
🔧 How to fix
Update to **2.51.2**.
🛡️ 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 'n8n-mcp' .` 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
-
1Identify exposure identify
grep -r 'n8n-mcp' . | 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 `n8n-mcp` を grep し、稼働しているサービス・バージョンを把握する。
-
6Apply patch patch
Upgrade n8n-mcp to 2.51.2ステージング環境で 2.51.2 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。
-
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
n8n-mcp
[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.51.2"}]}]
References
- advisory https://nvd.nist.gov/vuln/detail/CVE-2026-45707
- package https://github.com/czlonkowski/n8n-mcp
- web https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-jxx9-px88-pj69
- web https://github.com/czlonkowski/n8n-mcp/commit/853015d0897be7cf2d9d4726de195c938e4395ab
- web https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.51.2
- web https://github.com/advisories/GHSA-jxx9-px88-pj69