Chrome FileSystem flaw lets crafted pages run code outside sandbox

critical severity · published 2026-11-11

A remote attacker using social engineering can get Chrome to execute arbitrary code outside the sandbox via a crafted HTML page. That means running code on your machine with more access than a normal web page should ever have.

Fixed in: 157.0.8103.78

CVE: CVE-2026-126872

Source: NVD

Am I affected?

You are affected if the installed version is older than 157.0.8103.78. Check the version you have and update to 157.0.8103.78 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 2656 and your operating system.