{"id":"CVE-2026-121156","kind":"vulnerability","aliases":["CVE-2026-121156"],"related":[],"title":"Chrome: Dawn buffer overflow lets a crafted web page run code","description":"Buffer overflow in Dawn in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Critical)","summary":"A buffer overflow in Dawn, the WebGPU graphics component of Google Chrome, lets a remote attacker run arbitrary code outside the browser sandbox. The attack is triggered by a crafted HTML page that the victim opens.","severity":"critical","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browser","chrome","desktop","runtime","webgpu"],"not_affected_if":["chrome-at-or-above-157.0.8103.38"],"how_to_check":"- Open Chrome and check the version under Settings > About Chrome, or run `google-chrome --version` on Linux\n- Compare the version against `157.0.8103.38`; anything older is affected","fix":"- Google Chrome: move to `157.0.8103.38` or later","status":"open","published_at":"2026-11-03T21:17:23+00:00","first_seen_at":"2026-11-03T21:19:22+00:00","triaged_at":"2026-11-03T21:24:36+00:00","updated_at":"2026-11-03T21:24:36+00:00","category":"runtime","confidence":0.8,"triage":{"at":"2026-11-03T21:24:36Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: move to `157.0.8103.38` or later","reach":"internet","title":"Chrome: Dawn buffer overflow lets a crafted web page run code","impact":"high","summary":"A buffer overflow in Dawn, the WebGPU graphics component of Google Chrome, lets a remote attacker run arbitrary code outside the browser sandbox. The attack is triggered by a crafted HTML page that the victim opens.","audience":"everyone","category":"runtime","nicknames":[],"who_cares":["chrome","webgpu","desktop","browser"],"confidence":0.8,"fix_status":"available","needs_auth":"no","worst_case":"Attacker runs code outside the browser sandbox on the user's machine","analyst_note":"","how_to_check":"- Open Chrome and check the version under Settings > About Chrome, or run `google-chrome --version` on Linux\n- Compare the version against `157.0.8103.38`; anything older is affected","plain_action":"Update Google Chrome to version 157.0.8103.38 or newer: Chrome menu > Help > About Google Chrome.","needs_analyst":false,"not_affected_if":["chrome-at-or-above-157.0.8103.38"],"who_is_affected":"Any installed Google Chrome build older than 157.0.8103.38 is exposed, because the flaw is in the browser's own graphics code and a web page is enough to trigger it. Systems where Chrome is only used on a locked-down kiosk or where browsing is blocked are lower risk but still worth patching.","user_interaction":"yes","needs_special_setup":"unknown","severity_if_unknown":"critical"},"cost_usd":0.000696,"input_tokens":4111,"output_tokens":570,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121156':14A,17A '-2026':13A,16A '157.0.8103.38':68C 'allow':69C 'arbitrari':40B,76C 'attack':38B,47B,72C 'browser':18B,44B 'buffer':3A,24B,59C 'chrome':1A,19B,34B,65C 'chromium':86C 'code':11A,41B,77C 'compon':31B 'craft':7A,52B,83C 'critic':89C 'cve':12A,15A 'dawn':2A,27B,62C 'desktop':20B 'execut':75C 'googl':33B,64C 'graphic':30B 'html':53B,84C 'let':5A,35B 'open':58B 'outsid':42B,78C 'overflow':4A,25B,60C 'page':9A,54B,85C 'potenti':74C 'prior':66C 'remot':37B,71C 'run':10A,39B 'runtim':21B 'sandbox':45B,80C 'secur':87C 'sever':88C 'trigger':49B 'via':81C 'victim':57B 'web':8A 'webgpu':22B,29B","nicknames":[],"mitigations":[],"who_affected":"Any installed Google Chrome build older than 157.0.8103.38 is exposed, because the flaw is in the browser's own graphics code and a web page is enough to trigger it. Systems where Chrome is only used on a locked-down kiosk or where browsing is blocked are lower risk but still worth patching.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"everyone","plain_action":"Update Google Chrome to version 157.0.8103.38 or newer: Chrome menu > Help > About Google Chrome.","pkeys":[],"ptokens":[],"labels":["browser","chrome","critical","desktop","runtime","webgpu"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:23+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121156","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121156","severity":null,"published_at":"2026-11-03T21:17:23+00:00","modified_at":"2026-11-03T21:17:23+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"}