Threats affecting pkg:github/chromedevtools/chrome-devtools-mcp

CVE-2026-106484 is a medium severity vulnerability in Google Chrome's chrome-devtools-mcp component on Linux. It involves insufficient policy enforcement allowing a local attacker to perform arbitrary read and write operations via a malicious file. This issue affects versions from 1.1.0 up to but not including 1.5.0 and was fixed in version 1.5.0.

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 where $XDG_RUNTIME_DIR is unset, that runtime path falls back to /tmp/chrome-devtools-mcp-<uid>/daemon.pid. Because the write does not use O_NOFOLLOW, a local low-privilege user on the same POSIX host can pre-create /tmp/chrome-devtools-mcp-<victim_uid>/daemon.pid as a symlink to a file writable by the victim. When the victim later starts daemon mode, fs.writeFileSync() follows the symlink and truncates the target file to the daemon PID string. This vulnerability is fixed in 1.1.0.