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CVE-2026-70609 medium CVSS 5.7

Code Injection in electron (CVE-2026-70609)

Summary

Code injection in electron (CVE-2026-70609). Confidential information can be exposed externally. Exploitable via mode. Mitigation: upgrade to 42.0.0-beta.1 or later.

Original description

The description as published by the source.

Impact

The mode option of webContents.openDevTools() was not sanitized before use by the DevTools frontend. If an attacker can influence this value, script under their control may run in the DevTools context, which in unsandboxed configurations has access to Node.js.

Apps are only affected if untrusted input can reach the mode argument of openDevTools(), or if untrusted content can call openDevTools() on a `` it embeds. Apps that only ever pass a fixed dock mode are not affected.

Workarounds

Only pass fixed, allowlisted values (right, bottom, undocked, detach) as the DevTools mode, and do not expose openDevTools to untrusted content.

Fixed Versions

  • 42.0.0-beta.1
  • 41.2.0
  • 40.9.0
  • 39.8.7

For more information

If you have any questions or comments about this advisory, email Electron at security@electronjs.org

Source: GitHub Security Advisories (Global) NVD GitHub Advisory

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A vulnerability tracked as CVE-2026-70609 has been found in electron.
Attackers can target a specific entry point like mode over the network to misuse the product.
Confidential information can be exposed externally. CVSS score: 5.7/10.
What to do: upgrade electron to 42.0.0-beta.1 or later.
If unsure, ask your IT team or search "electron CVE-2026-70609" on the vendor's site.

CVE-2026-70609 (electron) — CWE-94 / CVSS v3 5.7
Attack vector: remote (network-reachable)
Attack surface: mode / right / bottom / undocked
Patched: 42.0.0-beta.1 — apply immediately
Workaround: Only pass fixed, allowlisted values (right, bottom, undocked, detach) as the DevTools mode, and do not expose openDevTools to untrusted content.
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

Arbitrary code execution (CWE-94) exists in electron. Attackers reach the vulnerable code path via mode.

📍 Affected scope

Check the vendor advisory for the affected versions of electron. Attack surface: mode / right / bottom / undocked.

🔥 Severity

Severity: Medium (CVSS 5.7/10). Confidential information can be exposed externally.

🔧 How to fix

Update to 42.0.0-beta.1.

🛡️ Workaround

Workaround: Only pass fixed, allowlisted values (right, bottom, undocked, detach) as the DevTools mode, and do not expose openDevTools to untrusted content.

🔍 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

Concrete steps and command examples for SOC/SRE teams to execute in order

  1. 1
    Identify 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。

  2. 2
    Apply temporary workaround mitigate 
    Only pass fixed, allowlisted values (`right`, `bottom`, `undocked`, `detach`) as the DevTools `mode`, and do not expose `openDevTools` to untrusted content.

    パッチが適用されるまでの応急処置として、Only pass fixed, allowlisted values (right, bottom, undocked, detach) as the DevTools mode, and do not expose openDevTools to untrusted content. を実施。回避策の副作用 (機能低下) を確認した上で。

  3. 3
    Apply patch patch 
    Upgrade electron to 42.0.0-beta.1

    ステージング環境で 42.0.0-beta.1 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を含めること。

  4. 4
    Post-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。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。

Affected packages

npm electron
[{"type":"SEMVER","events":[{"introduced":"42.0.0-alpha.1"},{"fixed":"42.0.0-beta.1"}]}]

References

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