CVE-2026-34770: Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS

Q: How do I fix CVE-2026-34770?

electron: upgrade to 38.8.6, 39.8.1, 40.8.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-34770 being exploited?

CVE-2026-34770 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-2026-34770 affect?

CVE-2026-34770 affects electron. Severity is high (CVSS 7.0). Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 38.8.6, 39.8.1, 40.8.0, and 41.0.0-beta.8, apps that use the powerMonitor module may be vulnerable to a use-after-free

Routine

HIGH 7.0UPGRADE

CVE-2026-34770 is a high-severity flaw (CVSS 7.0) 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 versions 38.8.6, 39.8.1, 40.8.0, and 41.0.0-beta.8, apps that use the powerMonitor module may be vulnerable to a use-after-free. After the native PowerMonitor object is garbage-collected, the associated OS-level resources (a message window on Windows, a shutdown handler on macOS) retain dangling references. A subsequent session-change

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.0 (High)
Attack vector	Local
Attack complexity	High
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 84%)
CISA exploited list	No
Weakness	CWE-416
Published	2026-04-04
Last modified	2026-07-24

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

Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-04 00:16 UTCPublished CVE record published
2026-07-24 22:10 UTCUpdated Record last modified

electronjs electron UPGRADE

Affected: < 38.8.6 · >= 39.0.0 and < 39.8.1 · >= 40.0.0 and < 40.8.0 · 41.0.0 alpha1 · 41.0.0 alpha2 · 41.0.0 alpha3 · 41.0.0 alpha4 · 41.0.0 alpha5

Fixed in: 38.8.6, 39.8.1, 40.8.0

Safe to downgrade to: a release before 39.0.0

1. Check installed version

npm ls electron

2. UPGRADE to 38.8.6

npm install electron@">=38.8.6"

3. If no update is available yet, DOWNGRADE to a release before 39.0.0

npm view electron versions npm install electron@"<39.0.0"

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-2026-34770?

electron: upgrade to 38.8.6, 39.8.1, 40.8.0. Exact commands for each OS are on this page.

Is CVE-2026-34770 being exploited?

CVE-2026-34770 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-2026-34770 affect?

CVE-2026-34770 affects electron. Severity is high (CVSS 7.0). Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 38.8.6, 39.8.1, 40.8.0, and 41.0.0-beta.8, apps that use the powerMonitor module may be vulnerable to a use-after-free

How urgent is CVE-2026-34770?

Priority 28/100. High severity

Software pages

Windows vulnerabilities · macOS vulnerabilities · Electron vulnerabilities

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References

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