Is CVE-2026-34776 actively exploited?

CVE-2026-34776 has no public evidence of in-the-wild exploitation as of 2026-04-27.

What is the CVSS score for CVE-2026-34776?

CVE-2026-34776 has a CVSS score of 5.3 (MEDIUM severity). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:L.

How do I patch CVE-2026-34776?

Patch guidance is available from electronjs security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-34776.

CVE-2026-34776 - remediation guidance & executive summary

Q: Which products are affected by CVE-2026-34776?

17 products: electronjs electron, electronjs electron, electronjs electron, electronjs electron, electronjs electron, and 12 more.

Description

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 38.8.6, 39.8.1, 40.8.1, and 41.0.0, on macOS and Linux, apps that call app.requestSingleInstanceLock() were vulnerable to an out-of-bounds heap read when parsing a crafted second-instance message. Leaked memory could be delivered to the app's second-instance event handler. This issue is limited to processes running as the same user as the Electron app. Apps that do not call app.requestSingleInstanceLock() are not affected. Windows is not affected by this issue. This issue has been patched in versions 38.8.6, 39.8.1, 40.8.1, and 41.0.0.

CVSS Metrics

Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:L
Attack Vector: local
Complexity: high
Privileges: low
User Action: none
Scope: unchanged
Confidentiality: high
Integrity: none
Availability: low
Weaknesses: CWE-125 · Out-of-bounds Read

Metadata

Primary Vendor: ELECTRONJS
Published: 4/4/2026
Last Modified: 4/27/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

electronjs : electronelectronjs : electronelectronjs : electronelectronjs : electronelectronjs : electronelectronjs : electronelectronjs : electronelectronjs : electronelectronjs : electronelectronjs : electronelectronjs : electronelectronjs : electronelectronjs : electronelectronjs : electronelectronjs : electronelectronjs : electronelectronjs : electron

Remediation Guidance

Executive Summary

Cite this page

CVE-2026-34776. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2026-34776

View on NIST NVD

CVE-2026-34776 vulnerability