CVE-2026-102673 Electron - Stored XSS

Electron < 41.10.4, 42.5.2, and 43.0.0 contains a stored XSS caused by sandboxed iframe popups not inheriting HTML sandbox restrictions, letting untrusted iframes access full origin cookies and scripting, exploit requires embedding untrusted content in sandboxed iframes.

CVSS base score 8.2 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.15% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Stored XSS
Impact
Stored XSS, Information Disclosure
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
Published
29 September 2026
Updated
15 October 2026
Weakness
CWE-346

Vendor fix

Update to versions 41.10.4, 42.5.2, or 43.0.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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