CVE-2026-34780
HIGHCVSS v3
8.3
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. From versions 39.0.0-alpha.1 to before 39.8.0, 40.0.0-alpha.1 to before 40.7.0, and 41.0.0-alpha.1 to before 41.0.0-beta.8, apps that pass VideoFrame objects (from the WebCodecs API) across the contextBridge are vulnerable to a context isolation bypass. An attacker who can execute JavaScript in the main world (for example, via XSS) can use a bridged VideoFrame to gain access to the isolated wo
Technical Details
- CVSS v3 Vector
- 3.1
- Published
- 4/4/2026
- Last Modified
- 4/7/2026
Frequently Asked Questions
What is CVE-2026-34780?
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. From versions 39.0.0-alpha.1 to before 39.8.0, 40.0.0-alpha.1 to before 40.7.0, and 41.0.0-alpha.1 to before 41.0.0-beta.8, apps that pass VideoFrame objects (from the WebCodecs API) across the contextBridge are vulnerable to a context isolation bypass. An attacker who can execute JavaScript in the main world (for example, via XSS) can use a bridged VideoFrame to gain access to the isolated wo
Is CVE-2026-34780 actively exploited?
Active exploitation of CVE-2026-34780 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-2026-34780?
CVE-2026-34780 has a CVSS v3 base score of 8.3 (HIGH severity), with vector string 3.1.
Is CVE-2026-34780 affecting your environment?
Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.