CVE-2026-34771
Electron: Use-after-free in WebContents fullscreen, pointer-lock, and keyboard-lock permission callbacks
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | electron | < 38.8.6 | 38.8.6 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Electronjs | Electron | before 38.8.6 from 39.0.0 before 39.8.0 from 40.0.0 before 40.7.0 Version 41.0.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-8337-3p73-46f4
- https://github.com/electron/electron/security/advisories/GHSA-8337-3p73-46f4
- https://nvd.nist.gov/vuln/detail/CVE-2026-34771
- https://access.redhat.com/security/cve/CVE-2026-34771
- https://bugzilla.redhat.com/show_bug.cgi?id=2454995
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34771.json