CVE-2026-34780
Electron context isolation bypass via VideoFrame bridge (XSS).
Is CVE-2026-34780 being exploited?
Not confirmed. CVE-2026-34780 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.33% probability of exploitation in the next 30 days.
How severe is CVE-2026-34780?
CVE-2026-34780 is rated High with a CVSS score of 8.3. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-34780?
Yes. A fix has been recorded for CVE-2026-34780. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-34780 affect?
CVE-2026-34780 affects Electron framework (v39.x before 39.8.0; v40.x before 40.7.0; v41.x before 41.0.0-beta.8), Apps bridging VideoFrame via contextBridge. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-34780?
Upgrade Electron to patched versions (39.8.0+, 40.7.0+, 41.0.0-beta.8+).
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
XSS can bypass isolation to access the main world and Node APIs via a bridged VideoFrame.
Patch when possible
- affected>= 39.0.0-alpha.1 and < 39.8.0
- affected>= 40.0.0-alpha.1 and < 40.7.0
- affected>= 41.0.0-alpha.1 and < 41.0.0-beta.8
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.