chrome-devtools-mcp: validatePath() does not canonicalize symlinks before enforcing roots

Summary I originally reported this through Google Bug Hunters. The Google Bug Hunters team said this is in OSS VRP scope but not reward-eligible due to the project tier, and asked me to file an issue or PR directly with this repository. I am reporting it privately here first because it is an...

Directory Traversal

Overview chrome-devtools-mcp is a MCP server for Chrome DevTools Affected versions of this package are vulnerable to Directory Traversal through the validatePath function. An attacker can access or modify files outside the intended workspace boundaries by leveraging symlinks that point to locatio...

CVE-2026-53765

Chrome DevTools for agents chrome-devtools-mcp lets your coding agent control and inspect a live Chrome browser. From 0.20.0 until 1.1.0, The chrome-devtools-mcp daemon writes its PID file with fs.writeFileSync to a deterministic runtime path. On typical macOS environments, and on Linux sessions...

CVE-2026-53765

CVE-2026-53765 / GHSA-3PVJ-JV98-QHJQ affects chrome-devtools-mcp (Chrome DevTools for agents). The vulnerability occurs when the daemon writes its PID file to a deterministic runtime path under /tmp on POSIX systems (macOS or Linux with XDG_RUNTIME_DIR unset). The code uses fs.writeFileSync() wit...

EUVD-2026-39105

Chrome DevTools for agents chrome-devtools-mcp lets your coding agent control and inspect a live Chrome browser. From 0.20.0 until 1.1.0, The chrome-devtools-mcp daemon writes its PID file with fs.writeFileSync to a deterministic runtime path. On typical macOS environments, and on Linux sessions...

CVE-2026-53765 chrome-devtools-mcp: daemon.pid write follows symlinks in /tmp fallback runtime directory

Chrome DevTools for agents chrome-devtools-mcp lets your coding agent control and inspect a live Chrome browser. From 0.20.0 until 1.1.0, The chrome-devtools-mcp daemon writes its PID file with fs.writeFileSync to a deterministic runtime path. On typical macOS environments, and on Linux sessions...

CVE-2026-53766 chrome-devtools-mcp: validatePath() does not canonicalize symlinks before enforcing roots

Chrome DevTools for agents chrome-devtools-mcp lets your coding agent control and inspect a live Chrome browser. From 0.24.0 until 1.1.0, McpContext.validatePath enforces workspace roots by checking whether path.resolvefilePath textually falls under one of the configured root paths. path.resolve...