CVE-2026-34767: Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS

Q: How do I fix CVE-2026-34767?

electron: upgrade to 38.8.6, 39.8.3, 40.8.3, 41.0.3. Exact commands for each OS are on this page.

Q: Is CVE-2026-34767 being exploited?

CVE-2026-34767 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-2026-34767 affect?

CVE-2026-34767 affects electron. Severity is medium (CVSS 5.9). Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 38.8.6, 39.8.3, 40.8.3, and 41.0.3, apps that register custom protocol handlers via protocol.handle() / protocol.regis

Q: How urgent is CVE-2026-34767?

Priority 23/100. No elevated risk signals yet.

Routine

MEDIUM 5.9UPGRADE

CVE-2026-34767 is a medium-severity flaw (CVSS 5.9) 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, 39.8.3, 40.8.3, and 41.0.3, apps that register custom protocol handlers via protocol.handle() / protocol.registerSchemesAsPrivileged() or modify response headers via webRequest.onHeadersReceived may be vulnerable to HTTP response header injection if attacker-controlled input is reflected into a response header name or

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.9 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 89%)
CISA exploited list	No
Weakness	CWE-74, CWE-113
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 < 39.8.3 · >= 40.0.0 and < 40.8.3 · >= 41.0.0 and < 41.0.3

Fixed in: 38.8.6, 39.8.3, 40.8.3, 41.0.3

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-2026-34767?

electron: upgrade to 38.8.6, 39.8.3, 40.8.3, 41.0.3. Exact commands for each OS are on this page.

Is CVE-2026-34767 being exploited?

CVE-2026-34767 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-2026-34767 affect?

CVE-2026-34767 affects electron. Severity is medium (CVSS 5.9). Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 38.8.6, 39.8.3, 40.8.3, and 41.0.3, apps that register custom protocol handlers via protocol.handle() / protocol.regis

How urgent is CVE-2026-34767?

Priority 23/100. No elevated risk signals yet.

Software pages

Electron vulnerabilities

Related CVEs

CVE-2026-102675 HIGH 7.4 UPGRADE Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS
CVE-2026-102673 HIGH 8.2 UPGRADE Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS
CVE-2026-102674 HIGH 8.2 UPGRADE Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS
CVE-2026-102676 HIGH 8.3 UPGRADE Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS
CVE-2026-102677 HIGH 7.8 UPGRADE Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS

References

← Back to latest CVEs