# CVE-2026-70603

## Summary

- **CVE ID:** CVE-2026-70603
- **Severity:** MEDIUM
- **CVSS Score:** 6 (CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N)
- **CWE:** CWE-20, CWE-158
- **Published:** Aug 5, 2026
- **Last Modified:** Aug 6, 2026

## 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.

## Affected Products

- electron — electron (< 39.8.6)
- electron — electron (>= 40.0.0-alpha.1, < 40.9.0)
- electron — electron (>= 41.0.0-alpha.1, < 41.1.1)
- electron — electron (>= 42.0.0-alpha.1, < 42.0.0-beta.1)

## References

- [CNA](https://github.com/electron/electron/security/advisories/GHSA-5c9j-mhmv-5xgx)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.10%
- **EPSS Percentile:** 0.9

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._