{"id":"CVE-2026-121200","kind":"vulnerability","aliases":["CVE-2026-121200"],"related":[],"title":"Chrome: DevTools reference flaw lets a crafted page escape the sandbox","description":"Incorrect reference resolution in DevTools in Google Chrome prior to 157.0.8103.38 allowed a remote attacker leveraging social engineering to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Medium)","summary":"Google Chrome's DevTools mishandles a reference, so a crafted HTML page can potentially run code outside the browser sandbox. Exploitation needs a remote attacker to use social engineering to get the victim to open the page.","severity":"medium","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","chrome","desktop","other"],"not_affected_if":["chrome-updated"],"how_to_check":"- Check the installed Chrome version in the browser's About page or with `chrome://version`; versions below `157.0.8103.38` are listed as affected.","fix":"- Google Chrome: move to `157.0.8103.38` or later.","status":"open","published_at":"2026-11-03T21:17:28+00:00","first_seen_at":"2026-11-03T21:19:26+00:00","triaged_at":"2026-11-03T21:22:49+00:00","updated_at":"2026-11-03T21:22:49+00:00","category":"other","confidence":0.6,"triage":{"at":"2026-11-03T21:22:49Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: move to `157.0.8103.38` or later.","reach":"internet","title":"Chrome: DevTools reference flaw lets a crafted page escape the sandbox","impact":"high","summary":"Google Chrome's DevTools mishandles a reference, so a crafted HTML page can potentially run code outside the browser sandbox. Exploitation needs a remote attacker to use social engineering to get the victim to open the page.","audience":"everyone","category":"other","nicknames":[],"who_cares":["chrome","browsers","desktop"],"confidence":0.6,"fix_status":"available","needs_auth":"no","worst_case":"Code runs outside the browser sandbox on the victim's machine","analyst_note":"","how_to_check":"- Check the installed Chrome version in the browser's About page or with `chrome://version`; versions below `157.0.8103.38` are listed as affected.","plain_action":"Update Google Chrome to version 157.0.8103.38 or later, then restart the browser.","needs_analyst":false,"not_affected_if":["chrome-updated"],"who_is_affected":"Anyone running Google Chrome before 157.0.8103.38 who can be lured to open a crafted HTML page. The sources do not describe any server-side or enterprise-only configuration.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"medium"},"cost_usd":0.000652,"input_tokens":4119,"output_tokens":480,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121200':14A,17A '-2026':13A,16A '157.0.8103.38':68C 'allow':69C 'arbitrari':79C 'attack':45B,72C 'browser':18B,39B 'chrome':1A,19B,22B,65C 'chromium':89C 'code':36B,80C 'craft':7A,30B,86C 'cve':12A,15A 'desktop':20B 'devtool':2A,24B,62C 'engin':49B,75C 'escap':9A 'execut':78C 'exploit':41B 'flaw':4A 'get':51B 'googl':21B,64C 'html':31B,87C 'incorrect':58C 'let':5A 'leverag':73C 'medium':92C 'mishandl':25B 'need':42B 'open':55B 'outsid':37B,81C 'page':8A,32B,57B,88C 'potenti':34B,77C 'prior':66C 'refer':3A,27B,59C 'remot':44B,71C 'resolut':60C 'run':35B 'sandbox':11A,40B,83C 'secur':90C 'sever':91C 'social':48B,74C 'use':47B 'via':84C 'victim':53B","nicknames":[],"mitigations":[],"who_affected":"Anyone running Google Chrome before 157.0.8103.38 who can be lured to open a crafted HTML page. The sources do not describe any server-side or enterprise-only configuration.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"everyone","plain_action":"Update Google Chrome to version 157.0.8103.38 or later, then restart the browser.","pkeys":[],"ptokens":[],"labels":["browsers","chrome","desktop","medium","other"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:28+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121200","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121200","severity":null,"published_at":"2026-11-03T21:17:28+00:00","modified_at":"2026-11-03T21:17:28+00:00","first_seen_at":"2026-11-03T21:19:26+00:00","fetched_at":"2026-11-03T21:19:26+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"}