CVE-2026-34771
HIGHCVSS v3
7.5
HIGH
EPSS Score
—
exploit probability
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
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 me
Technical Details
- CVSS v3 Vector
- 3.1
- Published
- 4/4/2026
- Last Modified
- 4/7/2026
Frequently Asked Questions
What is CVE-2026-34771?
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 me
Is CVE-2026-34771 actively exploited?
Active exploitation of CVE-2026-34771 has not been confirmed. The EPSS score is N/A%, indicating the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2026-34771?
CVE-2026-34771 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string 3.1.
Is CVE-2026-34771 affecting your environment?
Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.