{"id":"CVE-2026-121113","kind":"vulnerability","aliases":["CVE-2026-121113"],"related":[],"title":"Chrome: PDFium buffer overflow lets a crafted PDF run code","description":"Buffer overflow in PDFium in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted PDF file. (Chromium security severity: High)","summary":"A buffer overflow in PDFium, the PDF viewer built into Google Chrome, lets a remote attacker run arbitrary code inside the browser sandbox by opening a crafted PDF file. Chromium rates the flaw High severity.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","chrome","desktop","package","pdf"],"not_affected_if":["chrome-up-to-date"],"how_to_check":"- Check the installed Chrome version (chrome://settings/help or `google-chrome --version`) and compare it to the fixed release.\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":"2026-11-03T21:17:18+00:00","first_seen_at":"2026-11-03T21:19:18+00:00","triaged_at":"2026-11-03T21:25:07+00:00","updated_at":"2026-11-03T21:25:07+00:00","category":"package","confidence":0.7,"triage":{"at":"2026-11-03T21:25:07Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: move to `157.0.8103.38` or later.","reach":"internet","title":"Chrome: PDFium buffer overflow lets a crafted PDF run code","impact":"high","summary":"A buffer overflow in PDFium, the PDF viewer built into Google Chrome, lets a remote attacker run arbitrary code inside the browser sandbox by opening a crafted PDF file. Chromium rates the flaw High severity.","audience":"everyone","category":"package","nicknames":[],"who_cares":["chrome","desktop","browsers","pdf"],"confidence":0.7,"fix_status":"available","needs_auth":"no","worst_case":"Arbitrary code runs inside the Chrome sandbox after opening a PDF","analyst_note":"","how_to_check":"- Check the installed Chrome version (chrome://settings/help or `google-chrome --version`) and compare it to the fixed release.\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.","needs_analyst":false,"not_affected_if":["chrome-up-to-date"],"who_is_affected":"Any installation of Google Chrome prior to 157.0.8103.38 that opens PDFs, including the built-in PDF viewer. Exposure comes from a user or page opening a malicious PDF, so browsing and PDF viewing are the paths to review. Systems running only a managed or updated Chrome channel are likely already patched.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000691,"input_tokens":4108,"output_tokens":561,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121113':13A,16A '-2026':12A,15A '157.0.8103.38':66C 'allow':67C 'arbitrari':39B,73C 'attack':37B,70C 'browser':17B,43B 'buffer':3A,23B,57C 'built':30B 'chrome':1A,18B,33B,63C 'chromium':51B,83C 'code':10A,40B,74C 'craft':7A,48B,80C 'cve':11A,14A 'desktop':19B 'execut':72C 'file':50B,82C 'flaw':54B 'googl':32B,62C 'high':55B,86C 'insid':41B,75C 'let':5A,34B 'open':46B 'overflow':4A,24B,58C 'packag':20B 'pdf':8A,21B,28B,49B,81C 'pdfium':2A,26B,60C 'prior':64C 'rate':52B 'remot':36B,69C 'run':9A,38B 'sandbox':44B,77C 'secur':84C 'sever':56B,85C 'via':78C 'viewer':29B","nicknames":[],"mitigations":[],"who_affected":"Any installation of Google Chrome prior to 157.0.8103.38 that opens PDFs, including the built-in PDF viewer. Exposure comes from a user or page opening a malicious PDF, so browsing and PDF viewing are the paths to review. Systems running only a managed or updated Chrome channel are likely already patched.","tier":"B","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":["browsers","chrome","desktop","high","package","pdf"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:18+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121113","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121113","severity":null,"published_at":"2026-11-03T21:17:18+00:00","modified_at":"2026-11-03T21:17:19+00:00","first_seen_at":"2026-11-03T21:19:18+00:00","fetched_at":"2026-11-03T21:19:18+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"}