{"id":"CVE-2026-121091","kind":"vulnerability","aliases":["CVE-2026-121091"],"related":[],"title":"Google Chrome: flawed permission checks let a compromised renderer read data","description":"Incorrect authorization in Permissions in Google Chrome prior to 157.0.8103.38 allowed a remote attacker who had compromised the renderer process to obtain sensitive information via a crafted HTML page. (Chromium security severity: Medium)","summary":"Google Chrome versions before 157.0.8103.38 have an authorization flaw in the Permissions component. A remote attacker who has already compromised the renderer process can use a crafted HTML page to obtain sensitive information.","severity":"medium","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browser","chrome","desktop","other"],"not_affected_if":["chrome-updated"],"how_to_check":"- Check the installed Chrome version in Chrome's About page (chrome://settings/help) and compare it with `157.0.8103.38`.","fix":"- Google Chrome: `157.0.8103.38` or later.","status":"open","published_at":"2026-11-03T21:17:14+00:00","first_seen_at":"2026-11-03T21:19:13+00:00","triaged_at":"2026-11-03T21:25:29+00:00","updated_at":"2026-11-03T21:25:29+00:00","category":"other","confidence":0.7,"triage":{"at":"2026-11-03T21:25:29Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: `157.0.8103.38` or later.","reach":"internet","title":"Google Chrome: flawed permission checks let a compromised renderer read data","impact":"low","summary":"Google Chrome versions before 157.0.8103.38 have an authorization flaw in the Permissions component. A remote attacker who has already compromised the renderer process can use a crafted HTML page to obtain sensitive information.","audience":"everyone","category":"other","nicknames":[],"who_cares":["chrome","browser","desktop"],"confidence":0.7,"fix_status":"available","needs_auth":"no","worst_case":"Attacker reads sensitive information after compromising the renderer","analyst_note":"","how_to_check":"- Check the installed Chrome version in Chrome's About page (chrome://settings/help) and compare it with `157.0.8103.38`.","plain_action":"Update Google Chrome to version 157.0.8103.38 or later.","needs_analyst":false,"not_affected_if":["chrome-updated"],"who_is_affected":"Anyone running Google Chrome older than 157.0.8103.38 is exposed. The attack needs a renderer compromise first, so it is a second-stage flaw that is only reachable by visiting a crafted page.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"medium"},"cost_usd":0.000646,"input_tokens":4109,"output_tokens":470,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121091':14A,17A '-2026':13A,16A '157.0.8103.38':25B,63C 'allow':64C 'alreadi':39B 'attack':36B,67C 'author':28B,55C 'browser':18B 'check':5A 'chrome':2A,19B,22B,60C 'chromium':83C 'compon':33B 'compromis':8A,40B,70C 'craft':47B,80C 'cve':12A,15A 'data':11A 'desktop':20B 'flaw':3A,29B 'googl':1A,21B,59C 'html':48B,81C 'incorrect':54C 'inform':53B,77C 'let':6A 'medium':86C 'obtain':51B,75C 'page':49B,82C 'permiss':4A,32B,57C 'prior':61C 'process':43B,73C 'read':10A 'remot':35B,66C 'render':9A,42B,72C 'secur':84C 'sensit':52B,76C 'sever':85C 'use':45B 'version':23B 'via':78C","nicknames":[],"mitigations":[],"who_affected":"Anyone running Google Chrome older than 157.0.8103.38 is exposed. The attack needs a renderer compromise first, so it is a second-stage flaw that is only reachable by visiting a crafted page.","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","other"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:14+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121091","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121091","severity":null,"published_at":"2026-11-03T21:17:14+00:00","modified_at":"2026-11-03T21:17:14+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"}