Electron custom scheme responses can be read across origins

high severity · published 2026-09-29

In an affected Electron app, content from one origin can read responses meant to stay private when a custom scheme serves them without cross-origin protection. The risk applies when the app also loads untrusted content in the same session.

Fixed in: 44.0.0-beta.5

CVE: CVE-2026-102673, CVE-2026-102674, CVE-2026-102675, CVE-2026-102676, CVE-2026-102677, CVE-2026-70601, CVE-2026-70604, CVE-2026-70608

Source: GitHub Advisory

Am I affected?

You are affected if the installed version is older than 44.0.0-beta.5. Check the version you have and update to 44.0.0-beta.5 or later. The fixed version is verified against a vendor or advisory source.

Get the fix

FixLane has a reviewed fix procedure for this incident: a read-only check first, then the fix. Ask the Telegram bot, or connect an AI agent to the FixLane MCP server and call get_fix_prompt with incident id 200 and your operating system.