{"id":"CVE-2026-121224","kind":"vulnerability","aliases":["CVE-2026-121224"],"related":[],"title":"Google Chrome on Mac: sandbox escape via crafted network traffic","description":"Security issue in Desktop in Google Chrome on on Mac prior to 157.0.8103.38 allowed a remote attacker who had compromised the renderer process to potentially execute arbitrary code outside the sandbox via crafted network traffic. (Chromium security severity: High)","summary":"Google Chrome for Mac before 157.0.8103.38 has a flaw where a remote attacker who already compromised the renderer process can run code outside the browser sandbox. The attack is triggered by crafted network traffic.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browser","chrome","macos","other"],"not_affected_if":["chrome-updated","non-mac-platforms"],"how_to_check":"- Check the installed Chrome version in Chrome's About page or with `Google Chrome --version` on the Mac\n- Compare it against `157.0.8103.38`","fix":"- Google Chrome on Mac: move to `157.0.8103.38` or later","status":"open","published_at":"2026-11-03T21:17:32+00:00","first_seen_at":"2026-11-03T21:19:27+00:00","triaged_at":"2026-11-03T21:21:25+00:00","updated_at":"2026-11-03T21:21:25+00:00","category":"other","confidence":0.6,"triage":{"at":"2026-11-03T21:21:25Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome on Mac: move to `157.0.8103.38` or later","reach":"internet","title":"Google Chrome on Mac: sandbox escape via crafted network traffic","impact":"high","summary":"Google Chrome for Mac before 157.0.8103.38 has a flaw where a remote attacker who already compromised the renderer process can run code outside the browser sandbox. The attack is triggered by crafted network traffic.","audience":"everyone","category":"other","nicknames":[],"who_cares":["chrome","macos","browser"],"confidence":0.6,"fix_status":"available","needs_auth":"no","worst_case":"attacker runs code outside the browser sandbox on the machine","analyst_note":"Check the Chrome release notes for 157.0.8103.38 to confirm the fix and whether user interaction is needed.","how_to_check":"- Check the installed Chrome version in Chrome's About page or with `Google Chrome --version` on the Mac\n- Compare it against `157.0.8103.38`","plain_action":"Update Google Chrome on your Mac to version 157.0.8103.38 or later.","needs_analyst":true,"not_affected_if":["chrome-updated","non-mac-platforms"],"who_is_affected":"Mac installs of Chrome before 157.0.8103.38 are exposed. The attack needs a compromised renderer first, so it is a chained attack, not a single-step exploit. Managed fleets that pin Chrome versions should confirm they have moved past the fixed build.","user_interaction":"unknown","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.00069,"input_tokens":4118,"output_tokens":556,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121224':13A,16A '-2026':12A,15A '157.0.8103.38':25B,66C 'allow':67C 'alreadi':34B 'arbitrari':80C 'attack':32B,47B,70C 'browser':17B,44B 'chrome':2A,18B,21B,60C 'chromium':89C 'code':41B,81C 'compromis':35B,73C 'craft':8A,51B,86C 'cve':11A,14A 'desktop':57C 'escap':6A 'execut':79C 'flaw':28B 'googl':1A,20B,59C 'high':92C 'issu':55C 'mac':4A,23B,63C 'maco':19B 'network':9A,52B,87C 'outsid':42B,82C 'potenti':78C 'prior':64C 'process':38B,76C 'remot':31B,69C 'render':37B,75C 'run':40B 'sandbox':5A,45B,84C 'secur':54C,90C 'sever':91C 'traffic':10A,53B,88C 'trigger':49B 'via':7A,85C","nicknames":[],"mitigations":[],"who_affected":"Mac installs of Chrome before 157.0.8103.38 are exposed. The attack needs a compromised renderer first, so it is a chained attack, not a single-step exploit. Managed fleets that pin Chrome versions should confirm they have moved past the fixed build.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"everyone","plain_action":"Update Google Chrome on your Mac to version 157.0.8103.38 or later.","pkeys":[],"ptokens":[],"labels":["browser","chrome","high","macos","other"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:32+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121224","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121224","severity":null,"published_at":"2026-11-03T21:17:32+00:00","modified_at":"2026-11-03T21:17:32+00:00","first_seen_at":"2026-11-03T21:19:27+00:00","fetched_at":"2026-11-03T21:19:27+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"}