CVE-2026-102675: Electron: File and HTTP protocol handlers allow cross-origin reads without corsEnabled

Severity: high (CVSS 7.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-29 · updated 2026-10-27
Weakness: CWE-346

Description

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 41.10.6, 42.9.2, 43.4.1, and 44.0.0-beta.5, responses served through protocol.registerFileProtocol or protocol.registerHttpProtocol for a custom scheme registered with supportFetchAPI enabled but corsEnabled disabled could remain script-readable across origins. This residual issue completes the remediation for CVE-2026-70604. Applications are affected only when they expose such a scheme and load untrusted content in the same session. Schemes intentionally registered with corsEnabled enabled remain cross-origin readable by design. This issue is fixed in versions 41.10.6, 42.9.2, 43.4.1, and 44.0.0-beta.5.

Affected products

electron: before 41.10.6; from 42.0.0 before 42.9.2; from 43.0.0 before 43.4.1; 44.0.0-alpha1, 44.0.0-alpha2, 44.0.0-alpha3, 44.0.0-alpha4, 44.0.0-alpha5, 44.0.0-alpha6 (+7) — fixed in 41.10.6, 42.9.2, 43.4.1
electron: before 41.10.6; from 42.0.0-alpha.1, < 42.9.2; from 43.0.0-alpha.1, < 43.4.1; from 44.0.0-alpha.1, < 44.0.0-beta.5

How to fix

Upgrade to a fixed version: electron 41.10.6, 42.9.2, 43.4.1. Check the vendor advisory for mitigations.

References

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