{"id":"CVE-2026-121238","kind":"vulnerability","aliases":["CVE-2026-121238"],"related":[],"title":"Chrome: use-after-free lets a crafted web page run code","description":"Use after free in Source 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: Medium)","summary":"A memory-handling bug in Google Chrome before 157.0.8103.38 lets a remote attacker run arbitrary code inside the browser sandbox when a victim opens a crafted HTML page. Chromium rates the flaw Medium severity.","severity":"medium","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["chrome","desktop-browsers","other"],"not_affected_if":["chrome-updated"],"how_to_check":"- Check the installed Chrome version in the browser's About page or with `google-chrome --version` on Linux\n- Compare the result against `157.0.8103.38`","fix":"- Google Chrome: `157.0.8103.38` or later","status":"open","published_at":"2026-11-03T21:17:34+00:00","first_seen_at":"2026-11-03T21:19:28+00:00","triaged_at":"2026-11-03T21:21:12+00:00","updated_at":"2026-11-03T21:21:12+00:00","category":"other","confidence":0.8,"triage":{"at":"2026-11-03T21:21:12Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: `157.0.8103.38` or later","reach":"internet","title":"Chrome: use-after-free lets a crafted web page run code","impact":"high","summary":"A memory-handling bug in Google Chrome before 157.0.8103.38 lets a remote attacker run arbitrary code inside the browser sandbox when a victim opens a crafted HTML page. Chromium rates the flaw Medium severity.","audience":"everyone","category":"other","nicknames":[],"who_cares":["chrome","desktop-browsers"],"confidence":0.8,"fix_status":"available","needs_auth":"no","worst_case":"code runs inside the browser sandbox after visiting a page","analyst_note":"","how_to_check":"- Check the installed Chrome version in the browser's About page or with `google-chrome --version` on Linux\n- Compare the result against `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 when they open a malicious web page. Managed fleets and kiosks that browse only trusted internal sites face less risk but should still update.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"medium"},"cost_usd":0.00065,"input_tokens":4101,"output_tokens":480,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121238':15A,18A '-2026':14A,17A '157.0.8103.38':32B,68C 'allow':69C 'arbitrari':38B,75C 'attack':36B,72C 'browser':22B,42B 'bug':27B 'chrome':1A,19B,30B,65C 'chromium':52B,85C 'code':12A,39B,76C 'craft':8A,49B,82C 'cve':13A,16A 'desktop':21B 'desktop-brows':20B 'execut':74C 'flaw':55B 'free':5A,60C 'googl':29B,64C 'handl':26B 'html':50B,83C 'insid':40B,77C 'let':6A,33B 'medium':56B,88C 'memori':25B 'memory-handl':24B 'open':47B 'page':10A,51B,84C 'prior':66C 'rate':53B 'remot':35B,71C 'run':11A,37B 'sandbox':43B,79C 'secur':86C 'sever':57B,87C 'sourc':62C 'use':3A,58C 'use-after-fre':2A 'via':80C 'victim':46B 'web':9A","nicknames":[],"mitigations":[],"who_affected":"Anyone running Google Chrome older than 157.0.8103.38 is exposed when they open a malicious web page. Managed fleets and kiosks that browse only trusted internal sites face less risk but should still update.","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":["chrome","desktopbrowsers","medium","other"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:34+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121238","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121238","severity":null,"published_at":"2026-11-03T21:17:34+00:00","modified_at":"2026-11-03T21:17:34+00:00","first_seen_at":"2026-11-03T21:19:28+00:00","fetched_at":"2026-11-03T21:19:28+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"}