{"type":"post","id":"node-js-security-advisory-a-high-severity-rce-4b2e5e","slug":"node-js-security-advisory-a-high-severity-rce-4b2e5e","title":"Node.js Security Advisory: a high-severity RCE flaw in Node's Brotli decoder affects Node.js 22, 24, and 26.","description":"The Node.js Project published security releases for the 26.x, 24.x, and 22.x release lines on October 21, 2026.","retrieval_nugget":"The Node.js Project published security releases for the 26.x, 24.x, and 22.x release lines on October 21, 2026.","published_at":"2026-10-22","updated_at":"2026-10-22","record_date":"2026-10-22","date_kind":"published_at","topics":["agent-security","sandbox"],"entities":["Node.js Project","Node.js","Brotli","OpenSSL","Undici"],"related_patterns":["agent-security-moves-to-runtime-boundaries"],"novelty_label":"new_fact","what_changed":"Node.js disclosed a separate high-severity Brotli decoder RCE affecting Node.js 22, 24, and 26; none of the prior documents covers this advisory.","prior_refs":[],"source_url":"https://nodejs.org/en/blog/vulnerability/october-2026-security-releases","source_urls":["https://nodejs.org/en/blog/vulnerability/october-2026-security-releases"],"schema_version":"newruntime-agent-readable-v0.2","stable_id":"post:node-js-security-advisory-a-high-severity-rce-4b2e5e","status":"published","visuals":[],"editor":{"role":"editor","name":"Andrey Reshetnikov","profile":"https://newruntime.com/owner-profile.md","profile_json":"https://newruntime.com/owner-profile.json","same_as":["https://www.linkedin.com/in/reshetnikov1/","https://t.me/lapetuse"]},"routes":{"html":"https://newruntime.com/posts/node-js-security-advisory-a-high-severity-rce-4b2e5e/","markdown":"https://newruntime.com/posts/node-js-security-advisory-a-high-severity-rce-4b2e5e.md","json":"https://newruntime.com/posts/node-js-security-advisory-a-high-severity-rce-4b2e5e.json"},"next_reads":[{"type":"topic","path":"/topics/agent-security/","url":"https://newruntime.com/topics/agent-security/","title":"Agent Security","reason":"Explore the agent-security topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/agent-security.md","json_url":"https://newruntime.com/topics/agent-security.json"},{"type":"topic","path":"/topics/sandbox/","url":"https://newruntime.com/topics/sandbox/","title":"Sandbox","reason":"Explore the sandbox topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/sandbox.md","json_url":"https://newruntime.com/topics/sandbox.json"},{"type":"collection","path":"/posts/","url":"https://newruntime.com/posts/","title":"Field Notes","reason":"Open the latest editorial analysis.","media_type":"text/html","json_url":"https://newruntime.com/posts.json"},{"type":"collection","path":"/source-ledger.json","url":"https://newruntime.com/source-ledger.json","title":"Source Ledger","reason":"Inspect the public source evidence graph.","media_type":"application/json"}]}