{"id":"CVE-2026-121179","kind":"vulnerability","aliases":["CVE-2026-121179"],"related":[],"title":"Chrome: PDFium use-after-free lets a crafted web page run code","description":"Use after free 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 HTML page. (Chromium security severity: High)","summary":"A use-after-free bug in PDFium, Chrome's built-in PDF viewer library, can be triggered by a crafted HTML page. A remote attacker can execute arbitrary code inside the browser sandbox.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","chrome","endpoints","runtime"],"not_affected_if":["chrome-already-updated"],"how_to_check":"- Check the Chrome version under Settings > About Chrome (or `chrome://version`) and compare it with the fixed version below.","fix":"- Google Chrome: move to `157.0.8103.38` or later.","status":"open","published_at":"2026-11-03T21:17:26+00:00","first_seen_at":"2026-11-03T21:19:24+00:00","triaged_at":"2026-11-03T21:23:09+00:00","updated_at":"2026-11-03T21:23:09+00:00","category":"runtime","confidence":0.8,"triage":{"at":"2026-11-03T21:23:09Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: move to `157.0.8103.38` or later.","reach":"internet","title":"Chrome: PDFium use-after-free lets a crafted web page run code","impact":"high","summary":"A use-after-free bug in PDFium, Chrome's built-in PDF viewer library, can be triggered by a crafted HTML page. A remote attacker can execute arbitrary code inside the browser sandbox.","audience":"everyone","category":"runtime","nicknames":[],"who_cares":["chrome","browsers","endpoints"],"confidence":0.8,"fix_status":"available","needs_auth":"no","worst_case":"Attacker runs code inside the browser sandbox via a web page","analyst_note":"Check the Chrome release notes for 157.0.8103.38 and whether other Chromium browsers ship the fix; sources give only NVD text.","how_to_check":"- Check the Chrome version under Settings > About Chrome (or `chrome://version`) and compare it with the fixed version below.","plain_action":"Update Google Chrome to version 157.0.8103.38 or later: Chrome menu > Help > About Google Chrome.","needs_analyst":true,"not_affected_if":["chrome-already-updated"],"who_is_affected":"Any desktop or mobile install of Google Chrome before 157.0.8103.38 is exposed when a user opens a crafted web page. Attack needs no account; the victim only has to visit the page. Chromium-based browsers that bundle the same PDFium code may also be affected, but the sources only name Chrome.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000694,"input_tokens":4103,"output_tokens":568,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121179':16A,19A '-2026':15A,18A '157.0.8103.38':69C 'allow':70C 'arbitrari':53B,76C 'attack':50B,73C 'browser':20B,57B 'bug':29B 'built':35B 'built-in':34B 'chrome':1A,21B,32B,66C 'chromium':86C 'code':13A,54B,77C 'craft':9A,45B,83C 'cve':14A,17A 'endpoint':22B 'execut':52B,75C 'free':6A,28B,61C 'googl':65C 'high':89C 'html':46B,84C 'insid':55B,78C 'let':7A 'librari':39B 'page':11A,47B,85C 'pdf':37B 'pdfium':2A,31B,63C 'prior':67C 'remot':49B,72C 'run':12A 'runtim':23B 'sandbox':58B,80C 'secur':87C 'sever':88C 'trigger':42B 'use':4A,26B,59C 'use-after-fre':3A,25B 'via':81C 'viewer':38B 'web':10A","nicknames":[],"mitigations":[],"who_affected":"Any desktop or mobile install of Google Chrome before 157.0.8103.38 is exposed when a user opens a crafted web page. Attack needs no account; the victim only has to visit the page. Chromium-based browsers that bundle the same PDFium code may also be affected, but the sources only name Chrome.","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: Chrome menu > Help > About Google Chrome.","pkeys":[],"ptokens":[],"labels":["browsers","chrome","endpoints","high","runtime"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:26+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121179","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121179","severity":null,"published_at":"2026-11-03T21:17:26+00:00","modified_at":"2026-11-03T21:17:26+00:00","first_seen_at":"2026-11-03T21:19:24+00:00","fetched_at":"2026-11-03T21:19:24+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"}