Chrome TabStrip use after free allows code execution outside sandbox

critical severity · published 2026-11-03

A remote attacker could run arbitrary code outside Chrome's sandbox by getting a crafted Chrome extension opened in the browser.

Fixed in: 157.0.8103.38

CVE: CVE-2026-121257

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 794 and your operating system.