Chrome Network: bypass the same-origin rule (fix 156.0.8078.47)

critical severity · published 2026-10-20

A remote attacker who tricks the user can get around the same-origin rule that keeps websites apart through a crafted web page, using a privilege elevation flaw in the Network component of Chrome. Chromium rates it Medium.

Fixed in: 156.0.8078.47

CVE: CVE-2026-113342

Source: NVD

Am I affected?

You are affected if the installed version is older than 156.0.8078.47. Check the version you have and update to 156.0.8078.47 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 505 and your operating system.