CVE-2026-34773
CVE-2026-34773 · Electron: Registry key path injection in app.setAsDefaultProtocolClient on Windows
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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 Windows, app.setAsDefaultProtocolClient(protocol) did not validate the protocol name before writing to the registry. Apps that pass untrusted input as the protocol name may allow an attacker to write to arbitrary subkeys under HKCU\Software\Classes\, potentially hijacking existing protocol handlers. Apps are only affected if they call app.setAsDefaultProtocolClient() with a protocol name derived from external or untrusted input. Apps that use a hardcoded protocol name are not affected. This issue has been patched in versions 38.8.6, 39.8.1, 40.8.1, and 41.0.0.
CVSS 4.7 · Medium · EPSS 0.3% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
electron
- Versions
- < 38.8.6: Affected
- >= 39.0.0-alpha.1, < 39.8.1: Affected
- >= 40.0.0-alpha.1, < 40.8.1: Affected
- >= 41.0.0-alpha.1, < 41.0.0: Affected
No fix published
electron npm
- Affected ranges
- SEMVER: < 38.8.6
Update to 38.8.6
electron npm
- Affected ranges
- SEMVER: ≥ 39.0.0-alpha.1, < 39.8.1
Update to 39.8.1
electron npm
- Affected ranges
- SEMVER: ≥ 40.0.0-alpha.1, < 40.8.1
Update to 40.8.1
electron npm
- Affected ranges
- SEMVER: ≥ 41.0.0-alpha.1, < 41.0.0
Update to 41.0.0