CVE-2026-70612CWE-284broken-access-control

CVE-2026-70612

Medium · published August 5, 2026

CVSS v3.1
5.4
EPSS
0%
Percentile
36.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00429 · 36.1th percentile
Weakness
CWE-284 · Improper Access Control
Published
2026-08-05T23:17Z
Affected products (11)
ProductVersionsFixed in
electronjs/electron< 39.8.839.8.8
electronjs/electron≥ 40.0.0, < 40.9.040.9.0
electronjs/electron≥ 41.0.0, ≤ 41.2.1—
electronjs/electronall versions—
electronjs/electronall versions—
electronjs/electronall versions—
electronjs/electronall versions—
electronjs/electronall versions—
electronjs/electronall versions—
electronjs/electronall versions—
electronjs/electronall versions—
References (13)
https://github.com/electron/electron/commit/08b9d0a220e267d1a2402a44bdd01a2e9aa320b5 · [email protected]https://github.com/electron/electron/commit/2764e4c35168855f614876051823db4f58a3714a · [email protected]https://github.com/electron/electron/commit/477dcf7afc6550715f9ec5e6f39ee38e5dd7bf39 · [email protected]https://github.com/electron/electron/commit/c39e3d5687d57434c8d5fe814c5152efd2f631c3 · [email protected]https://github.com/electron/electron/pull/50961 · [email protected]https://github.com/electron/electron/pull/50962 · [email protected]https://github.com/electron/electron/pull/50963 · [email protected]https://github.com/electron/electron/pull/50964 · [email protected]https://github.com/electron/electron/releases/tag/v39.8.8 · [email protected]https://github.com/electron/electron/releases/tag/v40.9.0 · [email protected]https://github.com/electron/electron/releases/tag/v41.2.1 · [email protected]https://github.com/electron/electron/releases/tag/v42.0.0-beta.3 · [email protected]https://github.com/electron/electron/security/advisories/GHSA-p2rr-rvmm-c5fp · [email protected]
EPSS history
Timeline
  • 05 AUG 17:56Z
    Electron: Sandboxed iframes can launch external protocol handlers
    cvelistv5