github.com
https://github.com/electron/electron CVE-2026-70603
MEDIUM
Electron: shell.openPath path validation bypass via embedded null byte
Record summary
CVE-2026-70603 has a selected CVSS score of 6.0 (medium).
Description
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.
Description source: CVE List
Exploitation context
CISA SSVC decision
ExploitationNone
AutomatableNo
Technical impactTotal
CISA Coordinator · SSVC 2.0.3 · Evaluated Aug 5, 2026 · Source: CVE List
Affected products and versions
2| Product | Source | Version range | Status |
|---|---|---|---|
electronBrowse electron / electron | CVE List | < 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 | ||
electronBrowse npm / electron | GitHub Advisory | 42.0.0-alpha.1 to < 42.0.0-beta.1 · Fixed in 42.0.0-beta.1 | affected |
| 41.0.0-alpha.1 to < 41.1.1 · Fixed in 41.1.1 | affected | ||
| 40.0.0-alpha.1 to < 40.9.0 · Fixed in 40.9.0 | affected | ||
| Before 39.8.6 · Fixed in 39.8.6 | affected |
References
2github.comConfirmation
https://github.com/electron/electron/security/advisories/GHSA-5c9j-mhmv-5xgx