{"id":"CVE-2026-121176","kind":"vulnerability","aliases":["CVE-2026-121176"],"related":[],"title":"Chrome: uninitialized memory in Media lets a web page read sandbox memory","description":"Uninitialized resource in Media in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to read memory inside the sandbox via a crafted HTML page. (Chromium security severity: Medium)","summary":"Google Chrome before 157.0.8103.38 has an uninitialized resource in its Media component. A remote attacker can use a crafted HTML page to read memory inside the browser sandbox.","severity":"medium","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browser","chrome","linux","macos","runtime","windows"],"not_affected_if":["chrome-updated"],"how_to_check":"- Check the installed Chrome version in the browser's About page or with `chrome://version`","fix":"- Google Chrome: `157.0.8103.38` or later","status":"open","published_at":"2026-11-03T21:17:25+00:00","first_seen_at":"2026-11-03T21:19:24+00:00","triaged_at":"2026-11-03T21:23:12+00:00","updated_at":"2026-11-03T21:23:12+00:00","category":"runtime","confidence":0.6,"triage":{"at":"2026-11-03T21:23:12Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: `157.0.8103.38` or later","reach":"internet","title":"Chrome: uninitialized memory in Media lets a web page read sandbox memory","impact":"low","summary":"Google Chrome before 157.0.8103.38 has an uninitialized resource in its Media component. A remote attacker can use a crafted HTML page to read memory inside the browser sandbox.","audience":"everyone","category":"runtime","nicknames":[],"who_cares":["chrome","browser","windows","macos","linux"],"confidence":0.6,"fix_status":"available","needs_auth":"no","worst_case":"Attacker reads memory inside the browser sandbox from a crafted page","analyst_note":"","how_to_check":"- Check the installed Chrome version in the browser's About page or with `chrome://version`\n- unknown for managed fleets beyond that","plain_action":"Update Google Chrome to version 157.0.8103.38 or later: Chrome menu > Help > About Google Chrome.","needs_analyst":false,"not_affected_if":["chrome-updated"],"who_is_affected":"Any Google Chrome install before 157.0.8103.38 is exposed when a user visits a malicious web page. Managed fleets should check the deployed Chrome version. unknown whether any non-default configuration is required.","user_interaction":"yes","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000655,"input_tokens":4099,"output_tokens":491,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121176':15A,18A '-2026':14A,17A '157.0.8103.38':28B,62C 'allow':63C 'attack':39B,66C 'browser':19B,51B 'chrome':1A,20B,26B,59C 'chromium':78C 'compon':36B 'craft':43B,75C 'cve':13A,16A 'googl':25B,58C 'html':44B,76C 'insid':49B,70C 'let':6A 'linux':21B 'maco':22B 'media':5A,35B,56C 'medium':81C 'memori':3A,12A,48B,69C 'page':9A,45B,77C 'prior':60C 'read':10A,47B,68C 'remot':38B,65C 'resourc':32B,54C 'runtim':23B 'sandbox':11A,52B,72C 'secur':79C 'sever':80C 'uniniti':2A,31B,53C 'use':41B 'via':73C 'web':8A 'window':24B","nicknames":[],"mitigations":[],"who_affected":"Any Google Chrome install before 157.0.8103.38 is exposed when a user visits a malicious web page. Managed fleets should check the deployed Chrome version. unknown whether any non-default configuration is required.","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: Chrome menu > Help > About Google Chrome.","pkeys":[],"ptokens":[],"labels":["browser","chrome","linux","macos","medium","runtime","windows"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:25+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121176","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121176","severity":null,"published_at":"2026-11-03T21:17:25+00:00","modified_at":"2026-11-03T21:17:26+00:00","first_seen_at":"2026-11-03T21:19:24+00:00","fetched_at":"2026-11-03T21:19:24+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"}