CVE-2026-70606: Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS

Q: How do I fix CVE-2026-70606?

electron: upgrade to 40.10.6. Exact commands for each OS are on this page.

Q: Is CVE-2026-70606 being exploited?

CVE-2026-70606 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-2026-70606 affect?

CVE-2026-70606 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 40.10.6, 41.9.1, 42.5.1, and 43.0.0, when a custom protocol handler returned a ProtocolResponse with a url and no session, Elec

Q: How urgent is CVE-2026-70606?

Priority 25/100. No elevated risk signals yet.

Routine

MEDIUM 5.9UPGRADE

CVE-2026-70606 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 40.10.6, 41.9.1, 42.5.1, and 43.0.0, when a custom protocol handler returned a ProtocolResponse with a url and no session, Electron made the upstream request through defaultSession instead of the session that handled the protocol. A cached response could then be reused across otherwise isolated session partitions. Apps that use Protoco

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	0.3% (top 83%)
CISA exploited list	No
Weakness	CWE-668
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 16:17 UTCPublished CVE record published
2026-10-08 13:53 UTCUpdated Record last modified

electronjs electron UPGRADE

Affected: < 40.10.6 · >= 41.0.0 and <= 41.9.1 · >= 42.0.0 and <= 42.5.1 · 43.0.0 alpha1 · 43.0.0 alpha2 · 43.0.0 alpha3 · 43.0.0 alpha4 · 43.0.0 alpha5

Fixed in: 40.10.6

Safe to downgrade to: a release before 41.0.0

1. Check installed version

npm ls electron

2. UPGRADE to 40.10.6

npm install electron@">=40.10.6"

3. If no update is available yet, DOWNGRADE to a release before 41.0.0

npm view electron versions npm install electron@"<41.0.0"

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-2026-70606?

electron: upgrade to 40.10.6. Exact commands for each OS are on this page.

Is CVE-2026-70606 being exploited?

CVE-2026-70606 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-2026-70606 affect?

CVE-2026-70606 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 40.10.6, 41.9.1, 42.5.1, and 43.0.0, when a custom protocol handler returned a ProtocolResponse with a url and no session, Elec

How urgent is CVE-2026-70606?

Priority 25/100. No elevated risk signals yet.

Software pages

Electron vulnerabilities

Related CVEs

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
CVE-2026-70598 LOW 3.9 UPGRADE Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS

References

← Back to latest CVEs