{"id":"CVE-2026-121062","kind":"vulnerability","aliases":["CVE-2026-121062"],"related":[],"title":"Chrome: flawed API authorization lets a compromised renderer bypass system restrictions","description":"Incorrect authorization in API 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 before 157.0.8103.38 has an authorization flaw in an internal API. A remote attacker who has already compromised the renderer process, using a crafted HTML page, can bypass system access restrictions.","severity":"medium","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browser","chrome","desktop","runtime"],"not_affected_if":["already-updated","chrome-managed-updates-applied"],"how_to_check":"- Check the installed Chrome version: `chrome://version` in the browser or the Chrome version in the OS app list.\n- Confirm whether the version is below `157.0.8103.38`.","fix":"- Google Chrome: move to `157.0.8103.38` or later.","status":"open","published_at":"2026-11-03T21:17:10+00:00","first_seen_at":"2026-11-03T21:19:10+00:00","triaged_at":"2026-11-03T21:27:06+00:00","updated_at":"2026-11-03T21:27:06+00:00","category":"runtime","confidence":0.6,"triage":{"at":"2026-11-03T21:27:06Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: move to `157.0.8103.38` or later.","reach":"internet","title":"Chrome: flawed API authorization lets a compromised renderer bypass system restrictions","impact":"medium","summary":"Google Chrome before 157.0.8103.38 has an authorization flaw in an internal API. A remote attacker who has already compromised the renderer process, using a crafted HTML page, can bypass system access restrictions.","audience":"everyone","category":"runtime","nicknames":[],"who_cares":["chrome","browser","desktop"],"confidence":0.6,"fix_status":"available","needs_auth":"no","worst_case":"Attacker bypasses system access restrictions after compromising the renderer","analyst_note":"","how_to_check":"- Check the installed Chrome version: `chrome://version` in the browser or the Chrome version in the OS app list.\n- Confirm whether the version is below `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","chrome-managed-updates-applied"],"who_is_affected":"Anyone running Google Chrome before 157.0.8103.38 on desktop systems is exposed. The attack needs a separate renderer compromise first, so the flaw is a second-stage escape rather than a standalone entry point. unknown for managed-browser or embedded Chromium builds, which depend on their own vendor updates.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"medium"},"cost_usd":0.000683,"input_tokens":4107,"output_tokens":544,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121062':14A,17A '-2026':13A,16A '157.0.8103.38':25B,63C 'access':52B,77C 'allow':64C 'alreadi':39B 'api':3A,33B,57C 'attack':36B,67C 'author':4A,28B,55C 'browser':18B 'bypass':9A,50B,75C 'chrome':1A,19B,23B,60C 'chromium':84C 'compromis':7A,40B,70C 'craft':46B,81C 'cve':12A,15A 'desktop':20B 'flaw':2A,29B 'googl':22B,59C 'html':47B,82C 'incorrect':54C 'intern':32B 'let':5A 'medium':87C 'page':48B,83C 'prior':61C 'process':43B,73C 'remot':35B,66C 'render':8A,42B,72C 'restrict':11A,53B,78C 'runtim':21B 'secur':85C 'sever':86C 'system':10A,51B,76C 'use':44B 'via':79C","nicknames":[],"mitigations":[],"who_affected":"Anyone running Google Chrome before 157.0.8103.38 on desktop systems is exposed. The attack needs a separate renderer compromise first, so the flaw is a second-stage escape rather than a standalone entry point. unknown for managed-browser or embedded Chromium builds, which depend on their own vendor updates.","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":"2026-11-03T21:17:10+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121062","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121062","severity":null,"published_at":"2026-11-03T21:17:10+00:00","modified_at":"2026-11-03T21:17:10+00:00","first_seen_at":"2026-11-03T21:19:10+00:00","fetched_at":"2026-11-03T21:19:10+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"}