{"id":"CVE-2026-121207","kind":"vulnerability","aliases":["CVE-2026-121207"],"related":[],"title":"Chrome on Mac: uninitialized GPU memory lets a web page read data","description":"Uninitialized resource in Dawn in Google Chrome on on Mac prior to 157.0.8103.38 allowed a remote attacker to read memory outside the sandbox via a crafted HTML page. (Chromium security severity: High)","summary":"Google Chrome on macOS prior to 157.0.8103.38 has an uninitialized resource bug in Dawn, Chrome's WebGPU graphics component. A remote attacker can lure a victim to a crafted HTML page and read memory outside the browser sandbox.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","chrome","macos","runtime"],"not_affected_if":["chrome-updated","other-platforms"],"how_to_check":"- Open Chrome's About page (chrome://settings/help) and compare the version against `157.0.8103.38`\n- Check the installed version on the machine with `/Applications/Google Chrome.app/Contents/Info.plist` (key CFBundleShortVersionString)","fix":"- Google Chrome on Mac: 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":"2026-11-03T21:22:44+00:00","updated_at":"2026-11-03T21:22:44+00:00","category":"runtime","confidence":0.7,"triage":{"at":"2026-11-03T21:22:44Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome on Mac: move to `157.0.8103.38` or later","reach":"internet","title":"Chrome on Mac: uninitialized GPU memory lets a web page read data","impact":"medium","summary":"Google Chrome on macOS prior to 157.0.8103.38 has an uninitialized resource bug in Dawn, Chrome's WebGPU graphics component. A remote attacker can lure a victim to a crafted HTML page and read memory outside the browser sandbox.","audience":"everyone","category":"runtime","nicknames":[],"who_cares":["chrome","macos","browsers"],"confidence":0.7,"fix_status":"available","needs_auth":"no","worst_case":"Web page reads memory outside the browser sandbox","analyst_note":"","how_to_check":"- Open Chrome's About page (chrome://settings/help) and compare the version against `157.0.8103.38`\n- Check the installed version on the machine with `/Applications/Google Chrome.app/Contents/Info.plist` (key CFBundleShortVersionString)","plain_action":"Update Google Chrome on your Mac to version 157.0.8103.38 or later.","needs_analyst":false,"not_affected_if":["chrome-updated","other-platforms"],"who_is_affected":"Only Chrome on macOS builds older than 157.0.8103.38 are named in the sources. Exposure needs a user to open a crafted HTML page, so any Mac browsing the web with an unpatched Chrome is in scope. Chrome on other platforms is not named in the sources.","user_interaction":"yes","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000698,"input_tokens":4109,"output_tokens":574,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121207':15A,18A '-2026':14A,17A '157.0.8103.38':29B,73C 'allow':74C 'attack':44B,77C 'browser':19B,59B 'bug':34B 'chrome':1A,20B,24B,37B,67C 'chromium':89C 'compon':41B 'craft':51B,86C 'cve':13A,16A 'data':12A 'dawn':36B,64C 'googl':23B,66C 'gpu':5A 'graphic':40B 'high':92C 'html':52B,87C 'let':7A 'lure':46B 'mac':3A,70C 'maco':21B,26B 'memori':6A,56B,80C 'outsid':57B,81C 'page':10A,53B,88C 'prior':27B,71C 'read':11A,55B,79C 'remot':43B,76C 'resourc':33B,62C 'runtim':22B 'sandbox':60B,83C 'secur':90C 'sever':91C 'uniniti':4A,32B,61C 'via':84C 'victim':48B 'web':9A 'webgpu':39B","nicknames":[],"mitigations":[],"who_affected":"Only Chrome on macOS builds older than 157.0.8103.38 are named in the sources. Exposure needs a user to open a crafted HTML page, so any Mac browsing the web with an unpatched Chrome is in scope. Chrome on other platforms is not named in the sources.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"everyone","plain_action":"Update Google Chrome on your Mac to version 157.0.8103.38 or later.","pkeys":[],"ptokens":[],"labels":["browsers","chrome","high","macos","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-2026-121207","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121207","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"}