Chrome Browser: run code outside the sandbox (fix 157.0.8103.38)

high severity · published 2026-11-03

A remote attacker who has already taken over a browser renderer process can run their own code on the computer outside Chrome's sandbox through crafted network traffic, using an improper input validation flaw in the Browser component of Chrome. Chromium rates it Medium.

Fixed in: 157.0.8103.38

CVE: CVE-2026-121163

Source: NVD

Am I affected?

You are affected if the installed version is older than 157.0.8103.38. Check the version you have and update to 157.0.8103.38 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 743 and your operating system.