{"type":"post","id":"how-we-took-over-chatgpt-accounts-42d968","slug":"how-we-took-over-chatgpt-accounts-42d968","title":"How We Took Over ChatGPT Accounts","description":"Parameter Labs found a chain in ChatGPT’s HTML previews that could let a malicious shared conversation link run JavaScript in the signed-in recipient’s account context and expose private data or take actions.","retrieval_nugget":"Parameter Labs found a chain in ChatGPT’s HTML previews that could let a malicious shared conversation link run JavaScript in the signed-in recipient’s account context and expose private data or take actions. OpenAI closed the hole; the incident shows why sandbox boundaries must be tested across the whole host application, not just the embedded frame.","published_at":"2026-11-01","updated_at":"2026-11-01","record_date":"2026-11-01","date_kind":"published_at","topics":["agent-security","sandbox"],"entities":["OpenAI","ChatGPT","Parameter Labs","MathLive"],"related_patterns":["agent-security-moves-to-runtime-boundaries"],"novelty_label":"same_event","what_changed":"Same event as Do the Math: How We Took Over ChatGPT Accounts - Parameter","prior_refs":["memory:a2afac1e-8aa7-84ba-acc5-b4490452b69d","memory:a6b13c47-685e-839f-acdb-873c8b52b191"],"source_url":"https://simonwillison.net/2026/Oct/31/how-we-took-over-chatgpt-accounts","source_urls":["https://simonwillison.net/2026/Oct/31/how-we-took-over-chatgpt-accounts"],"schema_version":"newruntime-agent-readable-v0.2","stable_id":"post:how-we-took-over-chatgpt-accounts-42d968","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/how-we-took-over-chatgpt-accounts-42d968/","markdown":"https://newruntime.com/posts/how-we-took-over-chatgpt-accounts-42d968.md","json":"https://newruntime.com/posts/how-we-took-over-chatgpt-accounts-42d968.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"}]}