CVE-2026-70603
CVE-2026-70603 · Electron: shell.openPath path validation bypass via embedded null byte
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 39.8.6, 40.9.0, 41.1.1, and 42.0.0-beta.1, shell.openPath() did not reject paths containing embedded null bytes. Apps that perform string-only validation of file paths, for example checking the file extension, before passing them to shell.openPath() could be bypassed, allowing an attacker-controlled path to open a different file than the one that passed validation. Apps are only affected if they pass paths derived from untrusted input to shell.openPath() and rely on string-based validation without a filesystem check. This issue is fixed in versions 39.8.6, 40.9.0, 41.1.1, and 42.0.0-beta.1.
CVSS 6.0 · Medium · EPSS 0.1% · Public exploit · Fix available
- Published
- Updated
Stack: node
Affected products and versions
electron
- Versions
- < 39.8.6: Affected
- >= 40.0.0-alpha.1, < 40.9.0: Affected
- >= 41.0.0-alpha.1, < 41.1.1: Affected
- >= 42.0.0-alpha.1, < 42.0.0-beta.1: Affected
No fix published
electron npm
- Affected ranges
- SEMVER: ≥ 42.0.0-alpha.1, < 42.0.0-beta.1
Update to 42.0.0-beta.1
electron npm
- Affected ranges
- SEMVER: ≥ 41.0.0-alpha.1, < 41.1.1
Update to 41.1.1
electron npm
- Affected ranges
- SEMVER: ≥ 40.0.0-alpha.1, < 40.9.0
Update to 40.9.0
electron npm
- Affected ranges
- SEMVER: < 39.8.6
Update to 39.8.6