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CVE-2026-70612

Electron: Sandboxed iframes can launch external protocol handlers

Published: Aug 5, 2026Updated: Aug 5, 2026 Sources: CVE List NVDCWE-284
5.4MEDIUM
NVD MITRE
EPSS Score
0.5%
Top 62.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
Not available

Description

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.8, 40.9.0, 41.2.1, and 42.0.0-beta.3, 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 sandbox state was also not made available to the app permission handlers, affecting apps that render untrusted content in sandboxed iframes and grant the openExternal permission by default when no setPermissionRequestHandler is installed. This issue is fixed in 39.8.8, 40.9.0, 41.2.1, and 42.0.0-beta.3.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:HPR:NUI:NS:CC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-284

Affected Products

electron
package-ecosystemaka packager, electron-builder
electronLibrary
OSS Libraries / generic-library

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

References

https://github.com/electron/electron/security/advisories/GHSA-p2rr-rvmm-c5fp
github.com
https://github.com/electron/electron/pull/50961
github.com
https://github.com/electron/electron/pull/50962
github.com
and 10 more references View all →

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