{"id":"CVE-2026-121127","kind":"vulnerability","aliases":["CVE-2026-121127"],"related":[],"title":"Chrome: WebAudio use-after-free lets a crafted web page run code","description":"Use after free in WebAudio 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 WebAudio component of Google Chrome before 157.0.8103.38 lets a remote attacker run arbitrary code inside the browser sandbox when the victim opens a crafted HTML page. Chromium rates the flaw High severity.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browser","chrome","desktop","endpoints","other"],"not_affected_if":["chrome-up-to-date"],"how_to_check":"- Open Chrome and check the version under Settings > About Chrome, or run `chrome://version` in the address bar.\n- Confirm the installed version is `157.0.8103.38` or later.","fix":"- Google Chrome: move to `157.0.8103.38` or later.","status":"open","published_at":"2026-11-03T21:17:20+00:00","first_seen_at":"2026-11-03T21:19:19+00:00","triaged_at":"2026-11-03T21:24:52+00:00","updated_at":"2026-11-03T21:24:52+00:00","category":"other","confidence":0.8,"triage":{"at":"2026-11-03T21:24:52Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: move to `157.0.8103.38` or later.","reach":"internet","title":"Chrome: WebAudio use-after-free lets a crafted web page run code","impact":"high","summary":"A use-after-free bug in the WebAudio component of Google Chrome before 157.0.8103.38 lets a remote attacker run arbitrary code inside the browser sandbox when the victim opens a crafted HTML page. Chromium rates the flaw High severity.","audience":"everyone","category":"other","nicknames":[],"who_cares":["chrome","browser","desktop","endpoints"],"confidence":0.8,"fix_status":"available","needs_auth":"no","worst_case":"Attacker runs code inside the Chrome sandbox on the victim's machine.","analyst_note":"","how_to_check":"- Open Chrome and check the version under Settings > About Chrome, or run `chrome://version` in the address bar.\n- Confirm the installed version is `157.0.8103.38` or later.","plain_action":"Update Google Chrome to version 157.0.8103.38 or later: Settings > About Chrome.","needs_analyst":false,"not_affected_if":["chrome-up-to-date"],"who_is_affected":"Any device running Google Chrome older than 157.0.8103.38 is exposed when a user visits a malicious page. Managed fleets and kiosks running Chrome are in scope too. Users on a fixed version can skip it.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000676,"input_tokens":4104,"output_tokens":532,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121127':16A,19A '-2026':15A,18A '157.0.8103.38':38B,74C 'allow':75C 'arbitrari':44B,81C 'attack':42B,78C 'browser':20B,48B 'bug':29B 'chrome':1A,21B,36B,71C 'chromium':58B,91C 'code':13A,45B,82C 'compon':33B 'craft':9A,55B,88C 'cve':14A,17A 'desktop':22B 'endpoint':23B 'execut':80C 'flaw':61B 'free':6A,28B,66C 'googl':35B,70C 'high':62B,94C 'html':56B,89C 'insid':46B,83C 'let':7A,39B 'open':53B 'page':11A,57B,90C 'prior':72C 'rate':59B 'remot':41B,77C 'run':12A,43B 'sandbox':49B,85C 'secur':92C 'sever':63B,93C 'use':4A,26B,64C 'use-after-fre':3A,25B 'via':86C 'victim':52B 'web':10A 'webaudio':2A,32B,68C","nicknames":[],"mitigations":[],"who_affected":"Any device running Google Chrome older than 157.0.8103.38 is exposed when a user visits a malicious page. Managed fleets and kiosks running Chrome are in scope too. Users on a fixed version 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: Settings > About Chrome.","pkeys":[],"ptokens":[],"labels":["browser","chrome","desktop","endpoints","high","other"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:20+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121127","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121127","severity":null,"published_at":"2026-11-03T21:17:20+00:00","modified_at":"2026-11-03T21:17:21+00:00","first_seen_at":"2026-11-03T21:19:19+00:00","fetched_at":"2026-11-03T21:19:19+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"}