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CVE-2026-70604
high
CVSS 7.4
Vulnerability in electron (CVE-2026-70604)
Summary
vulnerability in electron (CVE-2026-70604). Confidential information can be exposed externally. Exploitable via ``XMLHttpRequest``. Mitigation: upgrade to `39.8.10` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-70604** has been found in electron.
Attackers can target a specific entry point like ``XMLHttpRequest`` over the network to misuse the product.
Confidential information can be exposed externally. CVSS score: 7.4/10.
What to do: upgrade electron to **39.8.10** or later.
If unsure, ask your IT team or search "electron CVE-2026-70604" on the vendor's site.
CVE-2026-70604 (electron) — CWE-942 / CVSS v3 7.4
Attack vector: remote (network-reachable) / unauthenticated
Attack surface: `XMLHttpRequest` / `Origin`
Patched: `39.8.10` — apply immediately
Workaround: Set `corsEnabled: true` on schemes that must enforce CORS, and validate the request `Origin` in your protocol handler before returning sensitive data.
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-942) exists in electron. Attackers reach the vulnerable code path via ``XMLHttpRequest`` without authentication.
📍 Affected scope
electron — . Attack surface: `XMLHttpRequest` / `Origin`.
🔥 Severity
Severity: High (CVSS 7.4/10). Confidential information can be exposed externally
🔧 How to fix
Update to **39.8.10**.
🛡️ Workaround
Workaround: Set `corsEnabled: true` on schemes that must enforce CORS, and validate the request `Origin` in your protocol handler before returning sensitive data.
🔍 Detection
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run `grep -r 'electron' .` 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 'electron' . | 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 `electron` 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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5Apply temporary workaround mitigate
Set `corsEnabled: true` on schemes that must enforce CORS, and validate the request `Origin` in your protocol handler before returning sensitive data.パッチが適用されるまでの応急処置として、Set `corsEnabled: true` on schemes that must enforce CORS, and validate the request `Origin` in your protocol handler before returning sensitive data. を実施。回避策の副作用 (機能低下) を確認した上で。
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6Apply patch patch
Upgrade electron to 39.8.10ステージング環境で 39.8.10 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
electron
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"39.8.10"}]}]