Medium severity · published Aug 5, 2026
CVE-2026-70607
Electron: window.open features string controls some window options considered privileged
5.3
CVSS
0.6%
EPSS
No
On KEV
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, some window options supplied by web content in the window.open() features string were applied to the new BrowserWindow without an allowlist. Untrusted content could set window options it should not control, including options that cause the main process to access attacker-chosen file or network paths, when untrusted content can call window.open() and the app does not override child window options via setWindowOpenHandler or overrideBrowserWindowOptions. This issue is fixed in 39.8.8, 40.9.0, 41.2.1, and 42.0.0-beta.3.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 46% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EL
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 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-70607
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-70607
Patch
https://github.com/electron/electron/commit/30cf3882de75ee651bd4e5f27002f13fd3d3163a
Patch
https://github.com/electron/electron/commit/4eff3dc09e4d1e62d649c5ce9902f532bb7469c7
Patch
https://github.com/electron/electron/commit/615d62500fc7732d068274b796c49487e652e90b
Patch
https://github.com/electron/electron/commit/fe2e7d0073949b4593b624b93abf1788f5377e55
Issue Tracking
https://github.com/electron/electron/pull/50946
Issue Tracking
https://github.com/electron/electron/pull/50947
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