{"id":"CVE-2026-121137","kind":"vulnerability","aliases":["CVE-2026-121137"],"related":[],"title":"Chrome: DevTools type confusion lets a crafted page run code","description":"Type confusion in DevTools in Google Chrome prior to 157.0.8103.38 allowed a remote attacker leveraging social engineering to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: High)","summary":"A type confusion bug in the DevTools component of Google Chrome before 157.0.8103.38 lets a remote attacker run arbitrary code inside the browser sandbox. The attack needs a user to visit a crafted HTML page through social engineering.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["chrome","desktop-browsers","linux","macos","runtime","windows"],"not_affected_if":["chrome-already-updated"],"how_to_check":"- Check the installed Chrome version in the browser's About page or with `google-chrome --version` on Linux\n- Compare the version against `157.0.8103.38`; anything lower is affected","fix":"- Google Chrome: move to `157.0.8103.38` or later","status":"open","published_at":"2026-11-03T21:17:22+00:00","first_seen_at":"2026-11-03T21:19:22+00:00","triaged_at":"2026-11-03T21:24:43+00:00","updated_at":"2026-11-03T21:24:43+00:00","category":"runtime","confidence":0.7,"triage":{"at":"2026-11-03T21:24:43Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: move to `157.0.8103.38` or later","reach":"internet","title":"Chrome: DevTools type confusion lets a crafted page run code","impact":"high","summary":"A type confusion bug in the DevTools component of Google Chrome before 157.0.8103.38 lets a remote attacker run arbitrary code inside the browser sandbox. The attack needs a user to visit a crafted HTML page through social engineering.","audience":"everyone","category":"runtime","nicknames":[],"who_cares":["chrome","desktop-browsers","windows","macos","linux"],"confidence":0.7,"fix_status":"available","needs_auth":"no","worst_case":"Attacker runs code inside the browser sandbox after a user visits a page","analyst_note":"","how_to_check":"- Check the installed Chrome version in the browser's About page or with `google-chrome --version` on Linux\n- Compare the version against `157.0.8103.38`; anything lower is affected","plain_action":"Update Google Chrome to version 157.0.8103.38 or later through the browser's update settings.","needs_analyst":false,"not_affected_if":["chrome-already-updated"],"who_is_affected":"Any desktop user running Google Chrome before 157.0.8103.38 who opens a malicious web page. Managed browsers that auto-update are likely already patched, but the sources do not say when the update was released to each channel. Chromium-based browsers that share this DevTools code may also be affected, but the sources do not confirm that.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000687,"input_tokens":4109,"output_tokens":552,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121137':13A,16A '-2026':12A,15A '157.0.8103.38':37B,72C 'allow':73C 'arbitrari':43B,82C 'attack':41B,50B,76C 'browser':20B,47B 'bug':28B 'chrome':1A,17B,35B,69C 'chromium':92C 'code':10A,44B,83C 'compon':32B 'confus':4A,27B,64C 'craft':7A,57B,89C 'cve':11A,14A 'desktop':19B 'desktop-brows':18B 'devtool':2A,31B,66C 'engin':62B,79C 'execut':81C 'googl':34B,68C 'high':95C 'html':58B,90C 'insid':45B,84C 'let':5A,38B 'leverag':77C 'linux':21B 'maco':22B 'need':51B 'page':8A,59B,91C 'prior':70C 'remot':40B,75C 'run':9A,42B 'runtim':23B 'sandbox':48B,86C 'secur':93C 'sever':94C 'social':61B,78C 'type':3A,26B,63C 'user':53B 'via':87C 'visit':55B 'window':24B","nicknames":[],"mitigations":[],"who_affected":"Any desktop user running Google Chrome before 157.0.8103.38 who opens a malicious web page. Managed browsers that auto-update are likely already patched, but the sources do not say when the update was released to each channel. Chromium-based browsers that share this DevTools code may also be affected, but the sources do not confirm that.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"everyone","plain_action":"Update Google Chrome to version 157.0.8103.38 or later through the browser's update settings.","pkeys":[],"ptokens":[],"labels":["chrome","desktopbrowsers","high","linux","macos","runtime","windows"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:22+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121137","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121137","severity":null,"published_at":"2026-11-03T21:17:22+00:00","modified_at":"2026-11-03T21:17:22+00:00","first_seen_at":"2026-11-03T21:19:22+00:00","fetched_at":"2026-11-03T21:19:22+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"}