Playwright browser caches hold outdated Chromium builds

published 2026-11-05

Playwright keeps its own copy of Chromium, and the cached builds are older than 156.0.8078.73. Pages opened by tests or agents in them run on an engine that lacks later browser security fixes.

Fixed in: 158.0.8127.18

Source: GitHub Advisory

Am I affected?

You are affected if the installed version is older than 158.0.8127.18. Check the version you have and update to 158.0.8127.18 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 1790 and your operating system.