{"id":"CVE-2026-121201","kind":"vulnerability","aliases":["CVE-2026-121201"],"related":[],"title":"Chrome: use-after-free in Animation lets a web page run code","description":"Use after free in Animation 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 Animation component of Google Chrome before 157.0.8103.38 lets a crafted HTML page make the browser run code inside its sandbox. Chromium rates it High severity.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","chrome","desktop","endpoints","runtime"],"not_affected_if":["chrome-updated"],"how_to_check":"- Open Chrome and check the version under Settings > About Chrome, or run `chrome --version` on the machine.\n- Compare the installed version against `157.0.8103.38`.","fix":"- Google Chrome: move to `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":"runtime","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: use-after-free in Animation lets a web page run code","impact":"high","summary":"A use-after-free bug in the Animation component of Google Chrome before 157.0.8103.38 lets a crafted HTML page make the browser run code inside its sandbox. Chromium rates it High severity.","audience":"everyone","category":"runtime","nicknames":[],"who_cares":["chrome","browsers","desktop","endpoints"],"confidence":0.6,"fix_status":"available","needs_auth":"no","worst_case":"Code runs inside the browser sandbox after visiting a crafted page.","analyst_note":"","how_to_check":"- Open Chrome and check the version under Settings > About Chrome, or run `chrome --version` on the machine.\n- Compare the installed version against `157.0.8103.38`.","plain_action":"Update Google Chrome to version 157.0.8103.38 or later.","needs_analyst":false,"not_affected_if":["chrome-updated"],"who_is_affected":"Anyone running Google Chrome before 157.0.8103.38 who visits a malicious or compromised web page is exposed. Chromium-based browsers that have not picked up the fix are also in scope, and the sources do not say which ones. Managed fleets should confirm the Chrome version on each endpoint.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000669,"input_tokens":4100,"output_tokens":517,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121201':16A,19A '-2026':15A,18A '157.0.8103.38':39B,68C 'allow':69C 'anim':7A,33B,62C 'arbitrari':75C 'attack':72C 'browser':20B,47B 'bug':30B 'chrome':1A,21B,37B,65C 'chromium':53B,85C 'code':13A,49B,76C 'compon':34B 'craft':42B,82C 'cve':14A,17A 'desktop':22B 'endpoint':23B 'execut':74C 'free':5A,29B,60C 'googl':36B,64C 'high':56B,88C 'html':43B,83C 'insid':50B,77C 'let':8A,40B 'make':45B 'page':11A,44B,84C 'prior':66C 'rate':54B 'remot':71C 'run':12A,48B 'runtim':24B 'sandbox':52B,79C 'secur':86C 'sever':57B,87C 'use':3A,27B,58C 'use-after-fre':2A,26B 'via':80C 'web':10A","nicknames":[],"mitigations":[],"who_affected":"Anyone running Google Chrome before 157.0.8103.38 who visits a malicious or compromised web page is exposed. Chromium-based browsers that have not picked up the fix are also in scope, and the sources do not say which ones. Managed fleets should confirm the Chrome version on each endpoint.","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","endpoints","high","runtime"],"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-2026-121201","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121201","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"}