Electron: Sandboxed iframes can launch external protocol handlers
Summary
| CVE | CVE-2026-70612 |
|---|---|
| State | PUBLISHED |
| Assigner | GitHub_M |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-05 19:17:41 UTC |
| Updated | 2026-08-05 20:17:17 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 5.4 MEDIUM from [email protected]
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
Problem Types: CWE-284 | CWE-284 CWE-284: Improper Access Control
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 5.4 | MEDIUM | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N |
| 3.1 | CNA | DECLARED | 5.4 | MEDIUM | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
HighPrivileges Required
NoneUser Interaction
NoneScope
ChangedConfidentiality
LowIntegrity
LowAvailability
NoneCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Electron | Electron | affected < 39.8.8 | Not specified |
| CNA | Electron | Electron | affected >= 40.0.0-alpha.1, < 40.9.0 | Not specified |
| CNA | Electron | Electron | affected >= 41.0.0-alpha.1, < 41.2.1 | Not specified |
| CNA | Electron | Electron | affected >= 42.0.0-alpha.1, < 42.0.0-beta.3 | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| github.com/electron/electron/pull/50963 | [email protected] | github.com | |
| github.com/electron/electron/commit/2764e4c35168855f614876051823db4f58a3... | [email protected] | github.com | |
| github.com/electron/electron/commit/477dcf7afc6550715f9ec5e6f39ee38e5dd7... | [email protected] | github.com | |
| github.com/electron/electron/pull/50962 | [email protected] | github.com | |
| github.com/electron/electron/releases/tag/v41.2.1 | [email protected] | github.com | |
| github.com/electron/electron/releases/tag/v39.8.8 | [email protected] | github.com | |
| github.com/electron/electron/commit/08b9d0a220e267d1a2402a44bdd01a2e9aa3... | [email protected] | github.com | |
| github.com/electron/electron/security/advisories/GHSA-p2rr-rvmm-c5fp | [email protected] | github.com | |
| github.com/electron/electron/pull/50961 | [email protected] | github.com | |
| github.com/electron/electron/pull/50964 | [email protected] | github.com | |
| github.com/electron/electron/releases/tag/v42.0.0-beta.3 | [email protected] | github.com | |
| github.com/electron/electron/releases/tag/v40.9.0 | [email protected] | github.com | |
| github.com/electron/electron/commit/c39e3d5687d57434c8d5fe814c5152efd2f6... | [email protected] | github.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.