CVE-2026-70602Electron: Extension tab APIs operate across session boundaries
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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Free account, 1 product
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, extension tab and scripting APIs were not scoped to the extension's own session. A malicious or compromised extension loaded into one session could navigate, script, and read from windows belonging to a different session. Apps are only affected if they load Chrome extensions via session.loadExtension and rely on separate sessions to isolate that extension from other content. This issue is fixed in versions 39.8.8, 40.9.0, 41.2.1, and 42.0.0-beta.3.
- CVSS
- 6.6 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:N
- Weakness (CWE)
- CWE-284
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Aug 5, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
electron electron electron:electron (from the name) | before 39.8.8; from 40.0.0-alpha.1, < 40.9.0; from 41.0.0-alpha.1, < 41.2.1; from 42.0.0-alpha.1, < 42.0.0-beta.3 | CNA record |
electronjs electron electronjs:electron | before 39.8.8; from 40.0.0 before 40.9.0; from 41.0.0 before 41.2.1; 42.0.0; 42.0.0; 42.0.0; 42.0.0; 42.0.0; and 3 more ranges | NVD |
References
- https://github.com/electron/electron/security/advisories/GHSA-m55f-7gqj-fr98x-refsource-confirm, vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.