{"id":"CVE-2026-121194","kind":"vulnerability","aliases":["CVE-2026-121194"],"related":[],"title":"Chrome: a compromised renderer can read data via crafted PDF","description":"Missing authorization in SiteIsolation 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 PDF file. (Chromium security severity: Medium)","summary":"Google Chrome's Site Isolation component is missing an authorization check, so a remote attacker who has already compromised the renderer process can read sensitive information through a crafted PDF file. Chromium rates it Medium severity.","severity":"medium","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browser","chrome","desktop","managed-fleets","other"],"not_affected_if":["chrome-updated","other-browser-only"],"how_to_check":"- Check the installed Chrome version at `chrome://settings/help` or run `google-chrome --version` on Linux; versions before `157.0.8103.38` are listed as affected.\n- Check managed fleets for Chrome builds older than `157.0.8103.38`.","fix":"- Google Chrome: move to `157.0.8103.38` or later.","status":"open","published_at":"2026-11-03T21:17:28+00:00","first_seen_at":"2026-11-03T21:19:25+00:00","triaged_at":"2026-11-03T21:22:57+00:00","updated_at":"2026-11-03T21:22:57+00:00","category":"other","confidence":0.7,"triage":{"at":"2026-11-03T21:22:57Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: move to `157.0.8103.38` or later.","reach":"internet","title":"Chrome: a compromised renderer can read data via crafted PDF","impact":"medium","summary":"Google Chrome's Site Isolation component is missing an authorization check, so a remote attacker who has already compromised the renderer process can read sensitive information through a crafted PDF file. Chromium rates it Medium severity.","audience":"everyone","category":"other","nicknames":[],"who_cares":["chrome","browser","desktop","managed-fleets"],"confidence":0.7,"fix_status":"available","needs_auth":"no","worst_case":"Sensitive data readable after renderer compromise via crafted PDF","analyst_note":"","how_to_check":"- Check the installed Chrome version at `chrome://settings/help` or run `google-chrome --version` on Linux; versions before `157.0.8103.38` are listed as affected.\n- Check managed fleets for Chrome builds older than `157.0.8103.38`.","plain_action":"Update Google Chrome to version 157.0.8103.38 or later: open the Chrome menu, go to Help, then About Google Chrome.","needs_analyst":false,"not_affected_if":["chrome-updated","other-browser-only"],"who_is_affected":"Any device running Google Chrome before 157.0.8103.38 is affected. Exploitation needs a renderer compromise first, so the flaw is a second-stage issue that makes an existing browser exploit more damaging.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"medium"},"cost_usd":0.000688,"input_tokens":4111,"output_tokens":554,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121194':13A,16A '-2026':12A,15A '157.0.8103.38':68C 'allow':69C 'alreadi':40B 'attack':37B,72C 'author':32B,60C 'browser':17B 'check':33B 'chrome':1A,18B,24B,65C 'chromium':54B,88C 'compon':28B 'compromis':3A,41B,75C 'craft':9A,51B,85C 'cve':11A,14A 'data':7A 'desktop':19B 'file':53B,87C 'fleet':22B 'googl':23B,64C 'inform':48B,82C 'isol':27B 'manag':21B 'managed-fleet':20B 'medium':57B,91C 'miss':30B,59C 'obtain':80C 'pdf':10A,52B,86C 'prior':66C 'process':44B,78C 'rate':55B 'read':6A,46B 'remot':36B,71C 'render':4A,43B,77C 'secur':89C 'sensit':47B,81C 'sever':58B,90C 'site':26B 'siteisol':62C 'via':8A,83C","nicknames":[],"mitigations":[],"who_affected":"Any device running Google Chrome before 157.0.8103.38 is affected. Exploitation needs a renderer compromise first, so the flaw is a second-stage issue that makes an existing browser exploit more damaging.","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: open the Chrome menu, go to Help, then About Google Chrome.","pkeys":[],"ptokens":[],"labels":["browser","chrome","desktop","managedfleets","medium","other"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:28+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121194","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121194","severity":null,"published_at":"2026-11-03T21:17:28+00:00","modified_at":"2026-11-03T21:17:28+00:00","first_seen_at":"2026-11-03T21:19:25+00:00","fetched_at":"2026-11-03T21:19:25+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"}