{"id":"CVE-2026-121140","kind":"vulnerability","aliases":["CVE-2026-121140"],"related":[],"title":"Chrome: out-of-bounds read lets a compromised renderer escape the sandbox","description":"Out of bounds read in Internals in Google Chrome 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 a crafted HTML page. (Chromium security severity: High)","summary":"An out-of-bounds read in Chrome's Internals component, in versions before 157.0.8103.38, can be triggered by a crafted HTML page. An attacker who has already compromised the renderer process could use it to run code outside the browser sandbox.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","chrome","desktop","endpoints","runtime"],"not_affected_if":["chrome-157.0.8103.38-or-later"],"how_to_check":"- Check the installed Chrome version in the browser's About page or with `google-chrome --version`\n- Confirm the version is below `157.0.8103.38`","fix":"- Google Chrome: move to `157.0.8103.38` or later","status":"open","published_at":"2026-11-03T21:17:22+00:00","first_seen_at":"2026-11-03T21:19:22+00:00","triaged_at":"2026-11-03T21:24:40+00:00","updated_at":"2026-11-03T21:24:40+00:00","category":"runtime","confidence":0.6,"triage":{"at":"2026-11-03T21:24:40Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: move to `157.0.8103.38` or later","reach":"internet","title":"Chrome: out-of-bounds read lets a compromised renderer escape the sandbox","impact":"high","summary":"An out-of-bounds read in Chrome's Internals component, in versions before 157.0.8103.38, can be triggered by a crafted HTML page. An attacker who has already compromised the renderer process could use it to run code outside the browser sandbox.","audience":"everyone","category":"runtime","nicknames":[],"who_cares":["chrome","browsers","desktop","endpoints"],"confidence":0.6,"fix_status":"available","needs_auth":"no","worst_case":"Code runs outside the browser sandbox after a renderer compromise","analyst_note":"","how_to_check":"- Check the installed Chrome version in the browser's About page or with `google-chrome --version`\n- Confirm the version is below `157.0.8103.38`","plain_action":"Update Google Chrome to version 157.0.8103.38 or later.","needs_analyst":false,"not_affected_if":["chrome-157.0.8103.38-or-later"],"who_is_affected":"Anyone running Google Chrome before 157.0.8103.38 who browses untrusted web pages. The attack needs a renderer compromise first, so it is a chained exploit rather than a single-step attack. Managed fleets that already pin a newer Chrome build can skip it.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000675,"input_tokens":4113,"output_tokens":528,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121140':16A,19A '-2026':15A,18A '157.0.8103.38':39B,78C 'allow':79C 'alreadi':52B 'arbitrari':92C 'attack':49B,82C 'bound':5A,29B,69C 'browser':20B,65B 'chrome':1A,21B,32B,75C 'chromium':102C 'code':62B,93C 'compon':35B 'compromis':9A,53B,85C 'could':57B 'craft':45B,99C 'cve':14A,17A 'desktop':22B 'endpoint':23B 'escap':11A 'execut':91C 'googl':74C 'high':105C 'html':46B,100C 'intern':34B,72C 'let':7A 'out-of-bound':2A,26B 'outsid':63B,94C 'page':47B,101C 'potenti':90C 'prior':76C 'process':56B,88C 'read':6A,30B,70C 'remot':81C 'render':10A,55B,87C 'run':61B 'runtim':24B 'sandbox':13A,66B,96C 'secur':103C 'sever':104C 'trigger':42B 'use':58B 'version':37B 'via':97C","nicknames":[],"mitigations":[],"who_affected":"Anyone running Google Chrome before 157.0.8103.38 who browses untrusted web pages. The attack needs a renderer compromise first, so it is a chained exploit rather than a single-step attack. Managed fleets that already pin a newer Chrome build can skip it.","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.","pkeys":[],"ptokens":[],"labels":["browsers","chrome","desktop","endpoints","high","runtime"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:22+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121140","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121140","severity":null,"published_at":"2026-11-03T21:17:22+00:00","modified_at":"2026-11-03T21:17:22+00:00","first_seen_at":"2026-11-03T21:19:22+00:00","fetched_at":"2026-11-03T21:19:22+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"}