{"id":"CVE-2026-121096","kind":"vulnerability","aliases":["CVE-2026-121096"],"related":[],"title":"Chrome: incomplete V8 cleanup lets a local program read memory","description":"Incomplete cleanup in V8 in Google Chrome prior to 157.0.8103.38 allowed a local attacker to read memory via a local program. (Chromium security severity: Medium)","summary":"Google Chrome's V8 JavaScript engine did not fully clean up some state, so a program already running on the same machine can read memory it should not see. Chromium rates the issue Medium severity.","severity":"medium","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browser","chrome","desktop","runtime"],"not_affected_if":["chrome-at-or-above-157.0.8103.38"],"how_to_check":"- Check the installed Chrome version in Chrome's About page or with `google-chrome --version` on Linux.\n- Compare it with the fixed version `157.0.8103.38`.","fix":"- Google Chrome: move to `157.0.8103.38` or later.","status":"open","published_at":"2026-11-03T21:17:15+00:00","first_seen_at":"2026-11-03T21:19:13+00:00","triaged_at":"2026-11-03T21:25:24+00:00","updated_at":"2026-11-03T21:25:24+00:00","category":"runtime","confidence":0.6,"triage":{"at":"2026-11-03T21:25:24Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: move to `157.0.8103.38` or later.","reach":"local","title":"Chrome: incomplete V8 cleanup lets a local program read memory","impact":"medium","summary":"Google Chrome's V8 JavaScript engine did not fully clean up some state, so a program already running on the same machine can read memory it should not see. Chromium rates the issue Medium severity.","audience":"everyone","category":"runtime","nicknames":[],"who_cares":["chrome","desktop","browser"],"confidence":0.6,"fix_status":"available","needs_auth":"unknown","worst_case":"local program reads memory belonging to the browser","analyst_note":"","how_to_check":"- Check the installed Chrome version in Chrome's About page or with `google-chrome --version` on Linux.\n- Compare it with the fixed version `157.0.8103.38`.","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-at-or-above-157.0.8103.38"],"who_is_affected":"Anyone running Google Chrome before 157.0.8103.38 on a machine where untrusted local programs could run. Browsing alone is not the described path; the attacker must already have local code execution. Machines with only trusted local software are lower risk but should still be updated.","user_interaction":"unknown","needs_special_setup":"no","severity_if_unknown":"medium"},"cost_usd":0.000668,"input_tokens":4092,"output_tokens":518,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121096':13A,16A '-2026':12A,15A '157.0.8103.38':65C 'allow':66C 'alreadi':37B 'attack':69C 'browser':17B 'chrome':1A,18B,22B,62C 'chromium':50B,77C 'clean':30B 'cleanup':4A,57C 'cve':11A,14A 'desktop':19B 'engin':26B 'fulli':29B 'googl':21B,61C 'incomplet':2A,56C 'issu':53B 'javascript':25B 'let':5A 'local':7A,68C,75C 'machin':42B 'medium':54B,80C 'memori':10A,45B,72C 'prior':63C 'program':8A,36B,76C 'rate':51B 'read':9A,44B,71C 'run':38B 'runtim':20B 'secur':78C 'see':49B 'sever':55B,79C 'state':33B 'v8':3A,24B,59C 'via':73C","nicknames":[],"mitigations":[],"who_affected":"Anyone running Google Chrome before 157.0.8103.38 on a machine where untrusted local programs could run. Browsing alone is not the described path; the attacker must already have local code execution. Machines with only trusted local software are lower risk but should still be updated.","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","desktop","medium","runtime"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:15+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121096","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121096","severity":null,"published_at":"2026-11-03T21:17:15+00:00","modified_at":"2026-11-03T21:17:15+00:00","first_seen_at":"2026-11-03T21:19:13+00:00","fetched_at":"2026-11-03T21:19:13+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"}