{"id":"CVE-2026-121061","kind":"vulnerability","aliases":["CVE-2026-121061"],"related":[],"title":"Chrome: use-after-free lets a crafted web page run code in sandbox","description":"Use after free in Modularization in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: High)","summary":"A use-after-free bug in the Modularization component of Google Chrome before 157.0.8103.38 lets a remote attacker run arbitrary code inside the browser sandbox. The attacker only needs the victim to open a crafted HTML page.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","chrome","desktop","linux","macos","other","windows"],"not_affected_if":["chrome-up-to-date","non-chromium-browser"],"how_to_check":"- Open Chrome's version page (chrome://version) and compare the version to `157.0.8103.38`\n- Check the installed version on managed machines with your device management tool; unknown otherwise","fix":"- Google Chrome: move to `157.0.8103.38` or later","status":"open","published_at":"2026-11-03T21:17:10+00:00","first_seen_at":"2026-11-03T21:19:10+00:00","triaged_at":"2026-11-03T21:27:13+00:00","updated_at":"2026-11-03T21:27:13+00:00","category":"other","confidence":0.6,"triage":{"at":"2026-11-03T21:27:13Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: move to `157.0.8103.38` or later","reach":"internet","title":"Chrome: use-after-free lets a crafted web page run code in sandbox","impact":"high","summary":"A use-after-free bug in the Modularization component of Google Chrome before 157.0.8103.38 lets a remote attacker run arbitrary code inside the browser sandbox. The attacker only needs the victim to open a crafted HTML page.","audience":"everyone","category":"other","nicknames":[],"who_cares":["chrome","browsers","desktop","windows","macos","linux"],"confidence":0.6,"fix_status":"available","needs_auth":"no","worst_case":"Attacker runs arbitrary code inside the browser sandbox","analyst_note":"Sources give only the NVD entry; check the Chrome Releases blog for the release note and any exploitation status.","how_to_check":"- Open Chrome's version page (chrome://version) and compare the version to `157.0.8103.38`\n- Check the installed version on managed machines with your device management tool; unknown otherwise","plain_action":"Update Google Chrome to version 157.0.8103.38 or later.","needs_analyst":true,"not_affected_if":["chrome-up-to-date","non-chromium-browser"],"who_is_affected":"Any device running Google Chrome older than 157.0.8103.38 is exposed when a user visits a malicious page. Systems where Chrome is not installed or is already on the fixed version can skip it.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000683,"input_tokens":4097,"output_tokens":547,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121061':17A,20A '-2026':16A,19A '157.0.8103.38':42B,76C 'allow':77C 'arbitrari':48B,83C 'attack':46B,55B,80C 'browser':21B,52B 'bug':33B 'chrome':1A,22B,40B,73C 'chromium':93C 'code':12A,49B,84C 'compon':37B 'craft':8A,63B,90C 'cve':15A,18A 'desktop':23B 'execut':82C 'free':5A,32B,68C 'googl':39B,72C 'high':96C 'html':64B,91C 'insid':50B,85C 'let':6A,43B 'linux':24B 'maco':25B 'modular':36B,70C 'need':57B 'open':61B 'page':10A,65B,92C 'prior':74C 'remot':45B,79C 'run':11A,47B 'sandbox':14A,53B,87C 'secur':94C 'sever':95C 'use':3A,30B,66C 'use-after-fre':2A,29B 'via':88C 'victim':59B 'web':9A 'window':27B","nicknames":[],"mitigations":[],"who_affected":"Any device running Google Chrome older than 157.0.8103.38 is exposed when a user visits a malicious page. Systems where Chrome is not installed or is already on the fixed version can skip it.","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.","pkeys":[],"ptokens":[],"labels":["browsers","chrome","desktop","high","linux","macos","other","windows"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:10+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121061","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121061","severity":null,"published_at":"2026-11-03T21:17:10+00:00","modified_at":"2026-11-03T21:17:10+00:00","first_seen_at":"2026-11-03T21:19:10+00:00","fetched_at":"2026-11-03T21:19:10+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"}