Address-bar spoofing flaw in the embedded browser of GitHub Copilot

published 2026-10-29

A spoofed address bar in the embedded browser can make a malicious page look like a trusted site, so an attacker can trick the developer into entering secrets or approving actions. The flaw was found in GitHub Copilot 1.1.27 and fixed in build 1.1.29.

Fixed in: 1.1.29

Source: theregister.com

Am I affected?

You are affected if the installed version is older than 1.1.29. Check the version you have and update to 1.1.29 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 1720 and your operating system.