Vulnerability in electron (CVE-2026-70602)
Summary
Vulnerability in electron (CVE-2026-70602). Confidential information can be exposed externally. Exploitable via session. Mitigation: upgrade to 42.0.0-beta.3 or later.
Original description
The description as published by the source.
Impact
Extension tab and scripting APIs were not scoped to the extension's own session. A malicious or compromised extension loaded into one session could navigate, script, and read from windows belonging to a different session.
Apps are only affected if they load Chrome extensions via session.loadExtension and rely on separate sessions to isolate that extension from other content. Apps that do not load extensions, or that use a single session, are not affected.
Workarounds
Only load extensions from sources you trust; do not rely on session separation alone to contain an extension.
Fixed Versions
42.0.0-beta.341.2.140.9.039.8.8
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-2026-70602 has been found in electron.
Attackers can target a specific entry point like session over the network to misuse the product.
Confidential information can be exposed externally. CVSS score: 6.6/10.
What to do: upgrade electron to 42.0.0-beta.3 or later.
If unsure, ask your IT team or search "electron CVE-2026-70602" on the vendor's site.
CVE-2026-70602 (electron) — CWE-284 / CVSS v3 6.6
Attack vector: remote (network-reachable) / no user interaction
Attack surface: session / session.loadExtension
Patched: 42.0.0-beta.3 — apply immediately
Workaround: Only load extensions from sources you trust; do not rely on session separation alone to contain an extension.
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-284) exists in electron. Attackers reach the vulnerable code path via session.
Check the vendor advisory for the affected versions of electron. Attack surface: session / session.loadExtension.
Severity: Medium (CVSS 6.6/10). Confidential information can be exposed externally.
Update to 42.0.0-beta.3.
Workaround: Only load extensions from sources you trust; do not rely on session separation alone to contain an extension.
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
-
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
Only load extensions from sources you trust; do not rely on session separation alone to contain an extension.パッチが適用されるまでの応急処置として、Only load extensions from sources you trust; do not rely on session separation alone to contain an extension. を実施。回避策の副作用 (機能低下) を確認した上で。
-
3Apply patch patch
Upgrade electron to 42.0.0-beta.3ステージング環境で 42.0.0-beta.3 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。
-
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