CVE-2026-34771
HIGHCVSS v3.1: 7.5 · EPSS: 0.0029 (20.3 percentile)
Source data as of:
At a glance
- Severity
- HIGH
- CVSS
- 7.5 v3.1 · NVD
- EPSS
- 0.0029 (20.3 percentile) · FIRST.org
- CISA KEV
- No
- Type
- Use After Free · NVD CWE
- Attack conditions (CVSS vector)
- NetworkNo privileges · Source: NVD Vector
- Affected vendors
- electronjs
- Published
- 2026-04-04 · Modified: 2026-06-30
- References
- Jump to references (4)
CVSS / EPSS / KEV
Source — CVSS: NVD · EPSS: FIRST.org · KEV: CISA. Data & Sources
Description
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 38.8.6, 39.8.0, 40.7.0, and 41.0.0-beta.8, apps that register an asynchronous session.setPermissionRequestHandler() may be vulnerable to a use-after-free when handling fullscreen, pointer-lock, or keyboard-lock permission requests. If the requesting frame navigates or the window closes while the permission handler is pending, invoking the stored callback dereferences freed memory, which may lead to a crash or memory corruption. Apps that do not set a permission request handler, or whose handler responds synchronously, are not affected. This issue has been patched in versions 38.8.6, 39.8.0, 40.7.0, and 41.0.0-beta.8.
References
Reference URLs as listed by NVD, grouped by a mechanical match on the link's host/pattern. Labels describe the link type only.