{"id":"CVE-2026-121070","kind":"vulnerability","aliases":["CVE-2026-121070"],"related":[],"title":"Chrome: use-after-free in WTF lets a crafted web page run code","description":"Use after free in WTF 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 use-after-free bug in the WTF library of Google Chrome lets a remote attacker run code inside the browser sandbox when a victim opens a crafted HTML page. The sources say the attack needs only a crafted page, and the chromium severity rating is Medium.","severity":"medium","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browser","chrome","desktop","package"],"not_affected_if":["auto-updated-browsers","chrome-158-or-later"],"how_to_check":"- Check the Chrome version in Chrome's About page or with `google-chrome --version`.\n- Compare the installed version against `157.0.8103.38`.","fix":"- Google Chrome: move to `157.0.8103.38` or later.","status":"open","published_at":"2026-11-03T21:17:11+00:00","first_seen_at":"2026-11-03T21:19:11+00:00","triaged_at":"2026-11-03T21:26:58+00:00","updated_at":"2026-11-03T21:26:58+00:00","category":"package","confidence":0.7,"triage":{"at":"2026-11-03T21:26:58Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: move to `157.0.8103.38` or later.","reach":"internet","title":"Chrome: use-after-free in WTF lets a crafted web page run code","impact":"high","summary":"A use-after-free bug in the WTF library of Google Chrome lets a remote attacker run code inside the browser sandbox when a victim opens a crafted HTML page. The sources say the attack needs only a crafted page, and the chromium severity rating is Medium.","audience":"everyone","category":"package","nicknames":[],"who_cares":["chrome","browser","desktop"],"confidence":0.7,"fix_status":"available","needs_auth":"no","worst_case":"Code runs inside the browser sandbox after a crafted page loads.","analyst_note":"","how_to_check":"- Check the Chrome version in Chrome's About page or with `google-chrome --version`.\n- Compare the installed version against `157.0.8103.38`.","plain_action":"Update Google Chrome to version 157.0.8103.38 or later: Chrome menu > Help > About Google Chrome.","needs_analyst":false,"not_affected_if":["chrome-158-or-later","auto-updated-browsers"],"who_is_affected":"Anyone running Google Chrome before 157.0.8103.38 is exposed when they open a crafted HTML page. Chromium-based browsers that pull in the same WTF code may also be affected, and those should be checked against their own release notes. Managed fleets with auto-update disabled are the most likely to remain exposed.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"medium"},"cost_usd":0.000689,"input_tokens":4103,"output_tokens":558,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121070':17A,20A '-2026':16A,19A '157.0.8103.38':83C 'allow':84C 'arbitrari':90C 'attack':41B,60B,87C 'browser':21B,46B 'bug':30B 'chrome':1A,22B,37B,80C 'chromium':68B,100C 'code':14A,43B,91C 'craft':10A,53B,64B,97C 'cve':15A,18A 'desktop':23B 'execut':89C 'free':5A,29B,75C 'googl':36B,79C 'html':54B,98C 'insid':44B,92C 'let':8A,38B 'librari':34B 'medium':72B,103C 'need':61B 'open':51B 'packag':24B 'page':12A,55B,65B,99C 'prior':81C 'rate':70B 'remot':40B,86C 'run':13A,42B 'sandbox':47B,94C 'say':58B 'secur':101C 'sever':69B,102C 'sourc':57B 'use':3A,27B,73C 'use-after-fre':2A,26B 'via':95C 'victim':50B 'web':11A 'wtf':7A,33B,77C","nicknames":[],"mitigations":[],"who_affected":"Anyone running Google Chrome before 157.0.8103.38 is exposed when they open a crafted HTML page. Chromium-based browsers that pull in the same WTF code may also be affected, and those should be checked against their own release notes. Managed fleets with auto-update disabled are the most likely to remain exposed.","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: Chrome menu > Help > About Google Chrome.","pkeys":[],"ptokens":[],"labels":["browser","chrome","desktop","medium","package"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:11+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121070","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121070","severity":null,"published_at":"2026-11-03T21:17:11+00:00","modified_at":"2026-11-03T21:17:12+00:00","first_seen_at":"2026-11-03T21:19:11+00:00","fetched_at":"2026-11-03T21:19:11+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"}