CVE-2026-70608

HIGHPre-NVD 7.27.2—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.2 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (36th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
7.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 7.2Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.10, 41.10.3, and 42.0.1, a sandboxed iframe without the allow-popups keyword could still open a new window or trigger setWindowOpenHandler with no user interaction because new-window navigations taking the OpenURL path did not apply the iframe sandbox popup restriction. Apps that embed untrusted content in sandboxed iframes and rely on the absence of allow-popups to prevent window creation are affected, while apps that deny window creation in setWindowOpenHandler or do not embed untrusted content in sandboxed iframes are not affected. This issue is fixed in 39.8.10, 41.10.3, and 42.0.1.

CVSS v3
7.2
EG Score
7.2HIGHmedium confidence
EG Risk
37
EG Risk 37/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity72% × 45%
Exploitation0% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.4%
EPSS %ILE
36th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 5, 2026

Last Modified

September 8, 2026

Advisory Details (10)

Auto-updated Aug 5, 2026
Patch available. Sources: github, github_pr, github_commit, github_release.
github_release Patch Available

electron v42.0.1

Patch available: electron/electron v42.0.1

https://github.com/electron/electron/releases/tag/v42.0.1
github_release Patch Available

electron v41.10.3

Patch available: electron/electron v41.10.3

https://github.com/electron/electron/releases/tag/v41.10.3
github_release Patch Available

electron v39.8.10

Patch available: electron/electron v39.8.10

https://github.com/electron/electron/releases/tag/v39.8.10
github_commit

commit 68cf8b7d9122 (electron/electron)

Fix landed in electron/electron commit 68cf8b7d9122 — awaiting tagged release

https://github.com/electron/electron/commit/68cf8b7d9122260f6b534a69a82c701a56cf159f
github_commit

commit 57cbe329c4ae (electron/electron)

Fix landed in electron/electron commit 57cbe329c4ae — awaiting tagged release

https://github.com/electron/electron/commit/57cbe329c4ae8aab5ac5ebdcb588adc9a11de0d3
github_commit

commit 3ff23c52ab36 (electron/electron)

Fix landed in electron/electron commit 3ff23c52ab36 — awaiting tagged release

https://github.com/electron/electron/commit/3ff23c52ab364a0afc6ab5bd7851291d3159de57
github_pr

fix: respect iframe sandbox flags on the OpenURL navigation path

Fix merged in electron/electron PR #51439 on 2026-05-05 — awaiting tagged release

https://github.com/electron/electron/pull/51439
github_pr

fix: respect iframe sandbox flags on the OpenURL navigation path

Fix merged in electron/electron PR #51438 on 2026-07-16 — awaiting tagged release

https://github.com/electron/electron/pull/51438
github_pr

fix: respect iframe sandbox flags on the OpenURL navigation path

Fix merged in electron/electron PR #51437 on 2026-05-05 — awaiting tagged release

https://github.com/electron/electron/pull/51437
github Patch Available

Sandboxed iframe can bypass the allow-popups restriction via the OpenURL navigation path · Advisory · electron/electron · GitHub

https://github.com/electron/electron/security/advisories/GHSA-9f4c-93c8-jc8g

Vendor Advisories for CVE-2026-70608(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFix by version rangeDependents
electron—
  • 42.0.0-alpha.1 up to 42.0.1: fixed in 42.0.1
  • 40.0.0-alpha.1 up to 41.10.3: fixed in 41.10.3
  • every version up to 39.8.10: fixed in 39.8.10
—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 11× in last 7d / 47× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 105 total refreshes for this CVE.

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Frequently asked(5)

What is CVE-2026-70608?
CVE-2026-70608 is a high vulnerability published on August 5, 2026. Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.10, 41.10.3, and 42.0.1, a sandboxed iframe without the allow-popups keyword could still open a new window or trigger setWindowOpenHandler with no user interaction because…
When was CVE-2026-70608 disclosed?
CVE-2026-70608 was first published on August 5, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-70608 actively exploited?
CVE-2026-70608 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (36th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-70608?
CVE-2026-70608 has a CVSS base score of 7.2 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-70608?
A fix for CVE-2026-70608 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-70608 are linked in the Vendor Advisories panel on this page.

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