{"id":"CVE-2026-121073","kind":"vulnerability","aliases":["CVE-2026-121073"],"related":[],"title":"Chrome: use-after-free in network stack allows code execution outside sandbox","description":"Use after free in Network in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to potentially execute arbitrary code outside the sandbox via crafted network traffic. (Chromium security severity: Low)","summary":"A memory-handling bug in the network component of Google Chrome before 157.0.8103.38 can be triggered by crafted network traffic. A remote attacker may be able to run arbitrary code outside the browser sandbox.","severity":"low","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","chrome","desktop","runtime"],"not_affected_if":["chrome-updated"],"how_to_check":"- Check the Chrome version: open chrome://settings/help or run `google-chrome --version` on Linux\n- Compare the installed version against `157.0.8103.38`","fix":"- Google Chrome: `157.0.8103.38` or later","status":"open","published_at":"2026-11-03T21:17:12+00:00","first_seen_at":"2026-11-03T21:19:11+00:00","triaged_at":"2026-11-03T21:26:56+00:00","updated_at":"2026-11-03T21:26:56+00:00","category":"runtime","confidence":0.7,"triage":{"at":"2026-11-03T21:26:56Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: `157.0.8103.38` or later","reach":"internet","title":"Chrome: use-after-free in network stack allows code execution outside sandbox","impact":"high","summary":"A memory-handling bug in the network component of Google Chrome before 157.0.8103.38 can be triggered by crafted network traffic. A remote attacker may be able to run arbitrary code outside the browser sandbox.","audience":"everyone","category":"runtime","nicknames":[],"who_cares":["chrome","browsers","desktop"],"confidence":0.7,"fix_status":"available","needs_auth":"no","worst_case":"Remote attacker runs arbitrary code outside the browser sandbox","analyst_note":"","how_to_check":"- Check the Chrome version: open chrome://settings/help or run `google-chrome --version` on Linux\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-updated"],"who_is_affected":"Anyone running Google Chrome older than 157.0.8103.38 is exposed, as the flaw is in the browser's network code and is reached by visiting or receiving crafted traffic. Chromium-based browsers that pick up the same Network fix are also in scope, but the sources do not list them. Managed fleets running an older Chrome build should be checked.","user_interaction":"unknown","needs_special_setup":"no","severity_if_unknown":"low"},"cost_usd":0.000684,"input_tokens":4099,"output_tokens":548,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121073':16A,19A '-2026':15A,18A '157.0.8103.38':37B,69C 'abl':50B 'allow':9A,70C 'arbitrari':53B,77C 'attack':47B,73C 'browser':20B,57B 'bug':28B 'chrome':1A,21B,35B,66C 'chromium':86C 'code':10A,54B,78C 'compon':32B 'craft':42B,83C 'cve':14A,17A 'desktop':22B 'execut':11A,76C 'free':5A,61C 'googl':34B,65C 'handl':27B 'low':89C 'may':48B 'memori':26B 'memory-handl':25B 'network':7A,31B,43B,63C,84C 'outsid':12A,55B,79C 'potenti':75C 'prior':67C 'remot':46B,72C 'run':52B 'runtim':23B 'sandbox':13A,58B,81C 'secur':87C 'sever':88C 'stack':8A 'traffic':44B,85C 'trigger':40B 'use':3A,59C 'use-after-fre':2A 'via':82C","nicknames":[],"mitigations":[],"who_affected":"Anyone running Google Chrome older than 157.0.8103.38 is exposed, as the flaw is in the browser's network code and is reached by visiting or receiving crafted traffic. Chromium-based browsers that pick up the same Network fix are also in scope, but the sources do not list them. Managed fleets running an older Chrome build should be checked.","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":["browsers","chrome","desktop","low","runtime"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:12+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121073","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121073","severity":null,"published_at":"2026-11-03T21:17:12+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"}