{"id":"CVE-2026-121040","kind":"vulnerability","aliases":["CVE-2026-121040"],"related":[],"title":"Chrome: compromised renderer can bypass system access restrictions via crafted page","description":"Incorrect authorization in Core in Google Chrome prior to 157.0.8103.38 allowed a remote attacker who had compromised the renderer process to bypass system access restrictions via a crafted HTML page. (Chromium security severity: Medium)","summary":"Google Chrome versions before 157.0.8103.38 have an incorrect authorization flaw in Core. A remote attacker who has already compromised the renderer process can bypass system access restrictions by serving a crafted HTML page.","severity":"medium","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browser","chrome","desktop","runtime"],"not_affected_if":["already-updated"],"how_to_check":"- Check the Chrome version in the browser's About page or run `google-chrome --version` on Linux\n- Compare the installed version against `157.0.8103.38`","fix":"- Google Chrome: update to `157.0.8103.38` or later","status":"open","published_at":"2026-11-03T21:17:07+00:00","first_seen_at":"2026-11-03T21:19:09+00:00","triaged_at":"2026-11-03T21:27:27+00:00","updated_at":"2026-11-03T21:27:27+00:00","category":"runtime","confidence":0.7,"triage":{"at":"2026-11-03T21:27:27Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: update to `157.0.8103.38` or later","reach":"internet","title":"Chrome: compromised renderer can bypass system access restrictions via crafted page","impact":"medium","summary":"Google Chrome versions before 157.0.8103.38 have an incorrect authorization flaw in Core. A remote attacker who has already compromised the renderer process can bypass system access restrictions by serving a crafted HTML page.","audience":"everyone","category":"runtime","nicknames":[],"who_cares":["chrome","browser","desktop"],"confidence":0.7,"fix_status":"available","needs_auth":"no","worst_case":"Attacker escapes renderer restrictions and bypasses system access controls","analyst_note":"","how_to_check":"- Check the Chrome version in the browser's About page or run `google-chrome --version` on Linux\n- Compare the installed version against `157.0.8103.38`","plain_action":"Update Google Chrome to version 157.0.8103.38 or later.","needs_analyst":false,"not_affected_if":["already-updated"],"who_is_affected":"Anyone running Google Chrome before 157.0.8103.38 is exposed, as the flaw is in the browser core. Exploitation requires a renderer compromise first, so the flaw is a second-stage escape rather than a standalone entry point. Systems that have already updated Chrome or run other browsers can skip it.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"medium"},"cost_usd":0.000671,"input_tokens":4106,"output_tokens":520,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121040':14A,17A '-2026':13A,16A '157.0.8103.38':26B,64C 'access':7A,47B,78C 'allow':65C 'alreadi':39B 'attack':36B,68C 'author':30B,56C 'browser':18B 'bypass':5A,45B,76C 'chrome':1A,19B,23B,61C 'chromium':85C 'compromis':2A,40B,71C 'core':33B,58C 'craft':10A,52B,82C 'cve':12A,15A 'desktop':20B 'flaw':31B 'googl':22B,60C 'html':53B,83C 'incorrect':29B,55C 'medium':88C 'page':11A,54B,84C 'prior':62C 'process':43B,74C 'remot':35B,67C 'render':3A,42B,73C 'restrict':8A,48B,79C 'runtim':21B 'secur':86C 'serv':50B 'sever':87C 'system':6A,46B,77C 'version':24B 'via':9A,80C","nicknames":[],"mitigations":[],"who_affected":"Anyone running Google Chrome before 157.0.8103.38 is exposed, as the flaw is in the browser core. Exploitation requires a renderer compromise first, so the flaw is a second-stage escape rather than a standalone entry point. Systems that have already updated Chrome or run other browsers can skip it.","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.","pkeys":[],"ptokens":[],"labels":["browser","chrome","desktop","medium","runtime"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:07+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121040","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121040","severity":null,"published_at":"2026-11-03T21:17:07+00:00","modified_at":"2026-11-03T21:17:08+00:00","first_seen_at":"2026-11-03T21:19:09+00:00","fetched_at":"2026-11-03T21:19:09+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"}