---
cve: "CVE-2026-34771"
severity: "HIGH"
cvss: 7.5
epss: "29%"
vendor: "electron"
kev: false
exploited: false
published: "2026-04-04 00:16:17"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-17T00:41:02+02:00"
---

# CVE-2026-34771

> 7.5 HIGH · 🧪 PoC

## Beschreibung

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 38.8.6, 39.8.0, 40.7.0, and 41.0.0-beta.8, apps that register an asynchronous session.setPermissionRequestHandler() may be vulnerable to a use-after-free when handling fullscreen, pointer-lock, or keyboard-lock permission requests. If the requesting frame navigates or the window closes while the permission handler is pending, invoking the stored callback dereferences freed memory, which may lead to a crash or memory corruption. Apps that do not set a permission request handler, or whose handler responds synchronously, are not affected. This issue has been patched in versions 38.8.6, 39.8.0, 40.7.0, and 41.0.0-beta.8.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- fbc489c43be82f0fc331560ae678a39aeaea38c8 (Commit)
- 69c8cbf259da0f84e9c1db04958516a68f7170aa (Commit)

## Referenzen

- <https://github.com/electron/electron/security/advisories/GHSA-8337-3p73-46f4>
- <https://access.redhat.com/security/cve/CVE-2026-34771>
- <https://bugzilla.redhat.com/show_bug.cgi?id=2454995>
- <https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34771.json>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-34771) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_