{"id":"CVE-2026-121208","kind":"vulnerability","aliases":["CVE-2026-121208"],"related":[],"title":"Chrome: out-of-bounds read in Media lets a web page run code","description":"Out of bounds read in Media in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to potentially execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: High)","summary":"A memory read past the end of a buffer in Chrome's Media component lets a remote attacker run code inside the browser sandbox via a crafted HTML page. Chromium rates it High severity.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","chrome","linux","macos","runtime","windows"],"not_affected_if":["patched-chrome"],"how_to_check":"- Open Chrome and check the version under Settings > About Chrome; the flaw affects versions before `157.0.8103.38`.","fix":"- Google Chrome: move to `157.0.8103.38` or later.","status":"open","published_at":"2026-11-03T21:17:30+00:00","first_seen_at":"2026-11-03T21:19:26+00:00","triaged_at":"2026-11-03T21:22:41+00:00","updated_at":"2026-11-03T21:22:41+00:00","category":"runtime","confidence":0.8,"triage":{"at":"2026-11-03T21:22:41Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: move to `157.0.8103.38` or later.","reach":"internet","title":"Chrome: out-of-bounds read in Media lets a web page run code","impact":"high","summary":"A memory read past the end of a buffer in Chrome's Media component lets a remote attacker run code inside the browser sandbox via a crafted HTML page. Chromium rates it High severity.","audience":"everyone","category":"runtime","nicknames":[],"who_cares":["chrome","browsers","windows","macos","linux"],"confidence":0.8,"fix_status":"available","needs_auth":"no","worst_case":"Attacker runs code inside the browser sandbox after a victim visits a page","analyst_note":"","how_to_check":"- Open Chrome and check the version under Settings > About Chrome; the flaw affects versions before `157.0.8103.38`.","plain_action":"Update Google Chrome to version 157.0.8103.38 or later, then restart the browser.","needs_analyst":false,"not_affected_if":["patched-chrome"],"who_is_affected":"Anyone running Google Chrome before version 157.0.8103.38 who opens a malicious web page can be exposed. Chromium-based browsers that pick up the same Media code may also be affected, but the sources do not say which ones. Users on a patched Chrome build can skip it.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000659,"input_tokens":4105,"output_tokens":496,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121208':17A,20A '-2026':16A,19A '157.0.8103.38':72C 'allow':73C 'arbitrari':80C 'attack':44B,76C 'bound':5A,63C 'browser':21B,49B 'buffer':35B 'chrome':1A,22B,37B,69C 'chromium':56B,90C 'code':14A,46B,81C 'compon':40B 'craft':53B,87C 'cve':15A,18A 'end':32B 'execut':79C 'googl':68C 'high':59B,93C 'html':54B,88C 'insid':47B,82C 'let':9A,41B 'linux':23B 'maco':24B 'media':8A,39B,66C 'memori':28B 'out-of-bound':2A 'page':12A,55B,89C 'past':30B 'potenti':78C 'prior':70C 'rate':57B 'read':6A,29B,64C 'remot':43B,75C 'run':13A,45B 'runtim':25B 'sandbox':50B,84C 'secur':91C 'sever':60B,92C 'via':51B,85C 'web':11A 'window':26B","nicknames":[],"mitigations":[],"who_affected":"Anyone running Google Chrome before version 157.0.8103.38 who opens a malicious web page can be exposed. Chromium-based browsers that pick up the same Media code may also be affected, but the sources do not say which ones. Users on a patched Chrome build 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, then restart the browser.","pkeys":[],"ptokens":[],"labels":["browsers","chrome","high","linux","macos","runtime","windows"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:30+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121208","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121208","severity":null,"published_at":"2026-11-03T21:17:30+00:00","modified_at":"2026-11-03T21:17:30+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"}