Electron: Sandboxed iframes can launch external protocol handlers
Published Aug 5, 2026 · Updated Oct 23, 2026 · Also known as GHSA-p2rr-rvmm-c5fp
Original summary
Normalized public record · Updated Oct 23, 2026
Electron: Sandboxed iframes can launch external protocol handlers
Publisher and source text is retained separately from QFinch interpretation.
QFinch assessment
Requests to open external protocol URLs from web content did not take iframe sandbox restrictions into account, so a sandboxed iframe could cause an OS-registered external application to be launched. The frame's sandbox state was also not made available to the app's permission handlers.
Potential impact
Requests to open external protocol URLs from web content did not take iframe sandbox restrictions into account, so a sandboxed iframe could cause an OS-registered external application to be launched. The frame's sandbox state was also not made available to the app's permission handlers. Apps are only affected if they render untrusted content in sandboxed iframes and grant the openExternal permission (granted by default when no setPermissionRequestHandler is installed). Apps whose permission handler denies openExternal for untrusted content are not affected.
Evidence: public source recordsAffected products
| Affected package, product or range | Fix status |
|---|---|
| Consult the referenced vendor advisory for affected versions. | Consult source advisory |
Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.
Remediation
Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.
- Confirm the affected product and reachable code path exist in your environment.
- Apply the vendor-supported patch or mitigation from the primary advisory.
- Rescan the exact deployed revision and retain verification evidence.
Evidence coverage
- SSVC priority
- LOW
- Confidence
- Not available
- Aliases
- GHSA-p2rr-rvmm-c5fp
Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.
Sources and record history
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Record history
Published Aug 5, 2026 · Last refreshed Oct 23, 2026