{"id":"CVE-2026-121202","kind":"vulnerability","aliases":["CVE-2026-121202"],"related":[],"title":"Chrome: Autofill use-after-free lets a crafted page escape the sandbox","description":"Use after free in Autofill 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":"A use-after-free bug in Chrome's Autofill feature can be triggered by a crafted HTML page after social engineering. The sources say an attacker could potentially run arbitrary code outside the browser sandbox.","severity":"medium","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["chrome","desktop-browser","linux","macos","other","windows"],"not_affected_if":["chrome-at-or-above-157.0.8103.38"],"how_to_check":"- Check the installed Chrome version (Chrome menu > Help > About Google Chrome) against the fixed version below.","fix":"- Google Chrome: `157.0.8103.38` or later","status":"open","published_at":"2026-11-03T21:17:29+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":0.7,"triage":{"at":"2026-11-03T21:22:49Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: `157.0.8103.38` or later","reach":"internet","title":"Chrome: Autofill use-after-free lets a crafted page escape the sandbox","impact":"high","summary":"A use-after-free bug in Chrome's Autofill feature can be triggered by a crafted HTML page after social engineering. The sources say an attacker could potentially run arbitrary code outside the browser sandbox.","audience":"everyone","category":"other","nicknames":[],"who_cares":["chrome","desktop-browser","windows","macos","linux"],"confidence":0.7,"fix_status":"available","needs_auth":"no","worst_case":"Code runs outside the browser sandbox on the user's machine","analyst_note":"","how_to_check":"- Check the installed Chrome version (Chrome menu > Help > About Google Chrome) against the fixed version below.\n- unknown","plain_action":"Update Google Chrome to version 157.0.8103.38 or later.","needs_analyst":false,"not_affected_if":["chrome-at-or-above-157.0.8103.38"],"who_is_affected":"Anyone running Google Chrome before 157.0.8103.38 who visits untrusted web pages. The sources describe a social engineering step, so a user has to be lured to the crafted page. Chromium-based browsers may need their own updates, which the sources do not cover.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"medium"},"cost_usd":0.000664,"input_tokens":4112,"output_tokens":506,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121202':16A,19A '-2026':15A,18A '157.0.8103.38':74C 'allow':75C 'arbitrari':58B,85C 'attack':54B,78C 'autofil':2A,37B,68C 'browser':23B,62B 'bug':33B 'chrome':1A,20B,35B,71C 'chromium':95C 'code':59B,86C 'could':55B 'craft':9A,44B,92C 'cve':14A,17A 'desktop':22B 'desktop-brows':21B 'engin':49B,81C 'escap':11A 'execut':84C 'featur':38B 'free':6A,32B,66C 'googl':70C 'html':45B,93C 'let':7A 'leverag':79C 'linux':24B 'maco':25B 'medium':98C 'outsid':60B,87C 'page':10A,46B,94C 'potenti':56B,83C 'prior':72C 'remot':77C 'run':57B 'sandbox':13A,63B,89C 'say':52B 'secur':96C 'sever':97C 'social':48B,80C 'sourc':51B 'trigger':41B 'use':4A,30B,64C 'use-after-fre':3A,29B 'via':90C 'window':27B","nicknames":[],"mitigations":[],"who_affected":"Anyone running Google Chrome before 157.0.8103.38 who visits untrusted web pages. The sources describe a social engineering step, so a user has to be lured to the crafted page. Chromium-based browsers may need their own updates, which the sources do not cover.","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.","pkeys":[],"ptokens":[],"labels":["chrome","desktopbrowser","linux","macos","medium","other","windows"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:29+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121202","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121202","severity":null,"published_at":"2026-11-03T21:17:29+00:00","modified_at":"2026-11-03T21:17:29+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"}