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CVE-2026-45805
high
CVSS 8.8
Vulnerability in @penpot/mcp (CVE-2026-45805)
Summary
vulnerability in @penpot/mcp (CVE-2026-45805). Successful exploitation can lead to full system takeover. Exploitable via ``ReplServer``. Mitigation: upgrade to `2.15.0` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-45805** has been found in @penpot/mcp.
Attackers can target a specific entry point like ``ReplServer`` over the network to misuse the product.
Successful exploitation can lead to full system takeover. CVSS score: 8.8/10.
What to do: upgrade @penpot/mcp to **2.15.0** or later.
If unsure, ask your IT team or search "@penpot/mcp CVE-2026-45805" on the vendor's site.
CVE-2026-45805 (@penpot/mcp) — CWE-749 / CVSS v3 8.8
Attack vector: adjacent-network / unauthenticated / no user interaction
Attack surface: `ReplServer` / `PenpotMcpServer` / `ReplServer.ts` / `this.host`
Patched: `2.15.0` — 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-749) exists in @penpot/mcp. Attackers reach the vulnerable code path via ``ReplServer`` without authentication.
📍 Affected scope
@penpot/mcp — . Attack surface: `ReplServer` / `PenpotMcpServer` / `ReplServer.ts` / `this.host`.
🔥 Severity
Severity: High (CVSS 8.8/10). Successful exploitation can lead to full system takeover
🔧 How to fix
Update to **2.15.0**.
🛡️ 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 '@penpot/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
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1Identify exposure identify
grep -r '@penpot/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 `@penpot/mcp` 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 @penpot/mcp to 2.15.0ステージング環境で 2.15.0 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
@penpot/mcp
[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.15.0"}]}]