---
cve: "CVE-2026-70603"
severity: "MEDIUM"
cvss: 6.0
epss: "10%"
vendor: "electron"
kev: false
exploited: false
published: "2026-08-05 16:17:04"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-17T04:42:08+02:00"
---

# CVE-2026-70603

> 6.0 MEDIUM · 🧪 PoC

## Beschreibung

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-Vektor

```
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Hoch | good |
| PR Privilegien | Gering | warn |
| UI Interaktion | Erforderlich | good |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Keine | good |

## Patch verfügbar (OSV)

- 0ba01d5cc68b5513b1b42d2f365e87ccd4c77c51 (Commit)
- ea4a478a8845bc9a00064918dab6f32477807d41 (Commit)

## Referenzen

- <https://github.com/electron/electron/security/advisories/GHSA-5c9j-mhmv-5xgx>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-70603) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_