Vulnerability in electron (CVE-2026-70601)
Summary
Vulnerability in electron (CVE-2026-70601). Confidential information can be exposed externally. Exploitable via contextBridge. Mitigation: upgrade to 42.0.0-beta.5 or later.
Original description
The description as published by the source.
Impact
Apps that expose Promise-returning functions to web content via contextBridge may be vulnerable to a context isolation bypass. Untrusted web content could obtain access to the isolated preload world and, through it, every capability the preload script has. In renderers without a sandbox, or with nodeIntegration enabled, this may escalate to Node.js access.
Apps are affected if they expose Promise-returning functions via contextBridge — the standard pattern for wrapping ipcRenderer.invoke — in windows that load untrusted content. Apps that never load untrusted content in those windows are not affected.
Workarounds
There are no app side workarounds, you must update to a patched version of Electron.
Fixed Versions
42.0.0-beta.541.2.240.9.239.8.9
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-2026-70601 has been found in electron.
Attackers can target a specific entry point like contextBridge over the network to misuse the product.
Confidential information can be exposed externally. CVSS score: 7.5/10.
What to do: upgrade electron to 42.0.0-beta.5 or later.
If unsure, ask your IT team or search "electron CVE-2026-70601" on the vendor's site.
CVE-2026-70601 (electron) — CWE-693 / CVSS v3 7.5
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Attack surface: contextBridge / nodeIntegration / ipcRenderer.invoke
Patched: 42.0.0-beta.5 — apply immediately
Workaround: There are no app side workarounds, you must update to a patched version of Electron.
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.
A vulnerability (CWE-693) exists in electron. Attackers reach the vulnerable code path via contextBridge without authentication.
Check the vendor advisory for the affected versions of electron. Attack surface: contextBridge / nodeIntegration / ipcRenderer.invoke.
Severity: High (CVSS 7.5/10). Confidential information can be exposed externally.
Update to 42.0.0-beta.5.
Workaround: There are no app side workarounds, you must update to a patched version of Electron.
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
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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。 -
2Apply temporary workaround mitigate
There are no app side workarounds, you must update to a patched version of Electron.パッチが適用されるまでの応急処置として、There are no app side workarounds, you must update to a patched version of Electron. 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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3Apply patch patch
Upgrade electron to 42.0.0-beta.5ステージング環境で 42.0.0-beta.5 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。
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4Post-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
References
- package github.com
- patch security-advisories@github.com
- web github.com