Chrome V8 off-by-one bug lets web pages run code inside the sandbox

high severity · published 2026-11-11

A crafted HTML page can potentially execute arbitrary code inside Chrome's sandbox. Chromium rates this V8 bug as High severity.

Fixed in: 157.0.8103.78

CVE: CVE-2026-126889

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 2668 and your operating system.