{"id":"CVE-2026-118333","kind":"vulnerability","aliases":["CVE-2026-118333"],"related":[],"title":"Google Chrome: missing authorization in Video lets pages bypass origin policy","description":"Missing authorization in Video in Google Chrome prior to 156.0.8078.73 allowed a remote attacker to bypass web origin policy via a crafted HTML page. (Chromium security severity: High)","summary":"Google Chrome's Video component lacks an authorization check, so a crafted HTML page can bypass the web origin policy. An attacker who lures a user to the page can read or act on content from other sites the user is visiting.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","chrome","endpoints","other"],"not_affected_if":["patched-chrome"],"how_to_check":"- Check the installed Chrome version in chrome://settings/help or run `google-chrome --version`\n- Confirm whether it is below `156.0.8078.73`","fix":"- Update Google Chrome to `156.0.8078.73` or later\n- Relaunch the browser after the update so the fix takes effect","status":"open","published_at":"2026-10-27T23:17:01+00:00","first_seen_at":"2026-10-27T23:29:43+00:00","triaged_at":"2026-10-27T23:31:49+00:00","updated_at":"2026-10-27T23:31:49+00:00","category":"other","confidence":0.6,"triage":{"at":"2026-10-27T23:31:49Z","model":"claude-haiku-5-5","output":{"fix":"- Update Google Chrome to `156.0.8078.73` or later\n- Relaunch the browser after the update so the fix takes effect","reach":"internet","title":"Google Chrome: missing authorization in Video lets pages bypass origin policy","impact":"medium","summary":"Google Chrome's Video component lacks an authorization check, so a crafted HTML page can bypass the web origin policy. An attacker who lures a user to the page can read or act on content from other sites the user is visiting.","category":"other","nicknames":[],"who_cares":["chrome","browsers","endpoints"],"confidence":0.6,"needs_auth":"no","worst_case":"Attacker reads or acts on other sites' content in the browser","analyst_note":"","how_to_check":"- Check the installed Chrome version in chrome://settings/help or run `google-chrome --version`\n- Confirm whether it is below `156.0.8078.73`","needs_analyst":false,"not_affected_if":["patched-chrome"],"who_is_affected":"Any user running Google Chrome older than `156.0.8078.73` is exposed when they open a crafted web page. Managed fleets that pin Chrome versions should treat this as a patch item. Systems that do not run Chrome, or run a patched build, can skip it.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000564,"input_tokens":3284,"output_tokens":471,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-118333':14A,17A '-2026':13A,16A '156.0.8078.73':72C 'act':53B 'allow':73C 'attack':42B,76C 'author':4A,28B,64C 'browser':18B 'bypass':9A,36B,78C 'check':29B 'chrome':2A,19B,22B,69C 'chromium':87C 'compon':25B 'content':55B 'craft':32B,84C 'cve':12A,15A 'endpoint':20B 'googl':1A,21B,68C 'high':90C 'html':33B,85C 'lack':26B 'let':7A 'lure':44B 'miss':3A,63C 'origin':10A,39B,80C 'page':8A,34B,49B,86C 'polici':11A,40B,81C 'prior':70C 'read':51B 'remot':75C 'secur':88C 'sever':89C 'site':58B 'user':46B,60B 'via':82C 'video':6A,24B,66C 'visit':62B 'web':38B,79C","nicknames":[],"mitigations":[],"who_affected":"Any user running Google Chrome older than `156.0.8078.73` is exposed when they open a crafted web page. Managed fleets that pin Chrome versions should treat this as a patch item. Systems that do not run Chrome, or run a patched build, can skip it.","tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-27T23:17:01+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-118333","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118333","severity":null,"published_at":"2026-10-27T23:17:01+00:00","modified_at":"2026-10-27T23:17:01+00:00","first_seen_at":"2026-10-27T23:29:43+00:00","fetched_at":"2026-10-27T23:29:43+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}