CVE-2026-102677: Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS

Q: How do I fix CVE-2026-102677?

electron: upgrade to 43.4.2. Exact commands for each OS are on this page.

Q: Is CVE-2026-102677 being exploited?

CVE-2026-102677 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-2026-102677 affect?

CVE-2026-102677 affects electron. Severity is high (CVSS 7.8). Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. From 42.3.3 until 42.10.0, 43.5.0, and 44.0.0-beta.6, Electron's sandboxed preload code cache did not verify that a cached entry matched

Routine

HIGH 7.8UPGRADE

CVE-2026-102677 is a high-severity flaw (CVSS 7.8) 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 42.3.3 until 42.10.0, 43.5.0, and 44.0.0-beta.6, Electron's sandboxed preload code cache did not verify that a cached entry matched the preload it was served for. A compromised renderer could write attacker-controlled cache data and cause Electron to reuse it for a later load, executing the renderer's code in the more privileged preload co

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.1% (top 99%)
CISA exploited list	No
Weakness	CWE-20, CWE-345
Published	2026-09-29
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

2026-09-29 18:17 UTCPublished CVE record published
2026-10-08 20:24 UTCUpdated Record last modified

electronjs electron UPGRADE

Affected: >= 42.3.3 and <= 42.10.0 · >= 43.0.0 and < 43.4.2 · 44.0.0 alpha1 · 44.0.0 alpha2 · 44.0.0 alpha3 · 44.0.0 alpha4 · 44.0.0 alpha5 · 44.0.0 alpha6

Fixed in: 43.4.2

Safe to downgrade to: a release before 42.3.3

1. Check installed version

npm ls electron

2. UPGRADE to 43.4.2

npm install electron@">=43.4.2"

3. If no update is available yet, DOWNGRADE to a release before 42.3.3

npm view electron versions npm install electron@"<42.3.3"

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-2026-102677?

electron: upgrade to 43.4.2. Exact commands for each OS are on this page.

Is CVE-2026-102677 being exploited?

CVE-2026-102677 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-2026-102677 affect?

CVE-2026-102677 affects electron. Severity is high (CVSS 7.8). Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. From 42.3.3 until 42.10.0, 43.5.0, and 44.0.0-beta.6, Electron's sandboxed preload code cache did not verify that a cached entry matched

How urgent is CVE-2026-102677?

Priority 28/100. High severity

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-2026-70598 LOW 3.9 UPGRADE Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS
CVE-2026-70599 MEDIUM 5.9 UPGRADE Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS

References

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