🔐 CVE Alert

CVE-2026-70612

MEDIUM 5.4

Electron: Sandboxed iframes can launch external protocol handlers

CVSS Score
5.4
EPSS Score
0.0%
EPSS Percentile
0th

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.

CWE CWE-284
Vendor electron
Product electron
Published Aug 5, 2026
Last Updated Aug 5, 2026
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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

Affected Versions

electron / electron
< 39.8.8 >= 40.0.0-alpha.1, < 40.9.0 >= 41.0.0-alpha.1, < 41.2.1 >= 42.0.0-alpha.1, < 42.0.0-beta.3

References

NVD ↗ CVE.org ↗ EPSS Data ↗
github.com: 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: https://github.com/electron/electron/pull/50963 github.com: https://github.com/electron/electron/pull/50964 github.com: https://github.com/electron/electron/commit/08b9d0a220e267d1a2402a44bdd01a2e9aa320b5 github.com: https://github.com/electron/electron/commit/2764e4c35168855f614876051823db4f58a3714a github.com: https://github.com/electron/electron/commit/477dcf7afc6550715f9ec5e6f39ee38e5dd7bf39 github.com: https://github.com/electron/electron/commit/c39e3d5687d57434c8d5fe814c5152efd2f631c3 github.com: https://github.com/electron/electron/releases/tag/v39.8.8 github.com: https://github.com/electron/electron/releases/tag/v40.9.0 github.com: https://github.com/electron/electron/releases/tag/v41.2.1 github.com: https://github.com/electron/electron/releases/tag/v42.0.0-beta.3