CVE-2026-70608: Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS

Q: How do I fix CVE-2026-70608?

electron: upgrade to 39.8.8, 41.10.3, 42.0.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-70608 being exploited?

CVE-2026-70608 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-70608 affect?

CVE-2026-70608 affects electron. Severity is high (CVSS 7.2). 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 setW

Q: How urgent is CVE-2026-70608?

Priority 39/100. High severity; Remotely exploitable, no login, no user action

Routine

HIGH 7.2REMOTEUPGRADE

CVE-2026-70608 is a high-severity flaw (CVSS 7.2) affecting electron. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 re

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 63%)
CISA exploited list	No
Weakness	CWE-693, CWE-1021
Published	2026-08-05
Last modified	2026-10-08

Publisher (CNA): GitHub, Inc. · Vendor: electronjs

Last updated 2026-10-08 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-05 18:17 UTCPublished CVE record published
2026-10-08 13:53 UTCUpdated Record last modified

electronjs electron UPGRADE

Affected: < 39.8.8 · >= 40.0.0 and < 41.10.3 · >= 42.0.0 and < 42.0.1

Fixed in: 39.8.8, 41.10.3, 42.0.1

Safe to downgrade to: a release before 40.0.0

1. Check installed version

npm ls electron

2. UPGRADE to 39.8.8

npm install electron@">=39.8.8"

3. If no update is available yet, DOWNGRADE to a release before 40.0.0

npm view electron versions npm install electron@"<40.0.0"

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-70608?

electron: upgrade to 39.8.8, 41.10.3, 42.0.1. Exact commands for each OS are on this page.

Is CVE-2026-70608 being exploited?

CVE-2026-70608 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-70608 affect?

CVE-2026-70608 affects electron. Severity is high (CVSS 7.2). 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 setW

How urgent is CVE-2026-70608?

Priority 39/100. High severity; Remotely exploitable, no login, no user action

Software pages

Electron vulnerabilities

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References

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