Broccoli2Shell: the Brotli decoder bug (CVE-2026-111497) - Affecting Node.js, Python, C library

CVE-2026-111497 (Broccoli2Shell, aka Node2Shell): an out-of-bounds write in Google’s Brotli decoder affecting Node.js, Python Brotli/brotlicffi and anything built on the C decoder. Affected versions, how to check, and how to fix it.