CVE-2026-34780: Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS

Q: How do I fix CVE-2026-34780?

electron: upgrade to 39.8.0, 40.7.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-34780 being exploited?

CVE-2026-34780 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-2026-34780 affect?

CVE-2026-34780 affects electron. Severity is high (CVSS 8.3). Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. From versions 39.0.0-alpha.1 to before 39.8.0, 40.0.0-alpha.1 to before 40.7.0, and 41.0.0-alpha.1 to before 41.0.0-beta.8, apps that pa

Routine

HIGH 8.3UPGRADE

CVE-2026-34780 is a high-severity flaw (CVSS 8.3) 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. From versions 39.0.0-alpha.1 to before 39.8.0, 40.0.0-alpha.1 to before 40.7.0, and 41.0.0-alpha.1 to before 41.0.0-beta.8, apps that pass VideoFrame objects (from the WebCodecs API) across the contextBridge are vulnerable to a context isolation bypass. An attacker who can execute JavaScript in the main world (for example, via XSS) can use a br

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.3 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 74%)
CISA exploited list	No
Weakness	CWE-668, CWE-1188, CWE-501
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 01:16 UTCPublished CVE record published
2026-07-24 22:10 UTCUpdated Record last modified

electronjs electron UPGRADE

Affected: >= 39.0.0 and < 39.8.0 · >= 40.0.0 and < 40.7.0 · 41.0.0 alpha1 · 41.0.0 alpha2 · 41.0.0 alpha3 · 41.0.0 alpha4 · 41.0.0 alpha5 · 41.0.0 alpha6

Fixed in: 39.8.0, 40.7.0

Safe to downgrade to: a release before 39.0.0

1. Check installed version

npm ls electron

2. UPGRADE to 39.8.0

npm install electron@">=39.8.0"

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-2026-34780?

electron: upgrade to 39.8.0, 40.7.0. Exact commands for each OS are on this page.

Is CVE-2026-34780 being exploited?

CVE-2026-34780 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-2026-34780 affect?

CVE-2026-34780 affects electron. Severity is high (CVSS 8.3). Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. From versions 39.0.0-alpha.1 to before 39.8.0, 40.0.0-alpha.1 to before 40.7.0, and 41.0.0-alpha.1 to before 41.0.0-beta.8, apps that pa

How urgent is CVE-2026-34780?

Priority 35/100. High severity

Software pages

Electron vulnerabilities

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References

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