{"id":"CVE-2026-118316","kind":"vulnerability","aliases":["CVE-2026-118316"],"related":[],"title":"Chrome V8: crafted HTML page can run code outside the sandbox","description":"Improper input validation in V8 in Google Chrome prior to 156.0.8078.73 allowed a remote attacker to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: High)","summary":"Improper input validation in the V8 JavaScript engine in Google Chrome before 156.0.8078.73 lets a remote attacker run arbitrary code outside the browser sandbox. The attack is delivered through a crafted HTML page that a user visits.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","chrome","desktop","endpoints","other"],"not_affected_if":["already-updated","no-chrome-installed"],"how_to_check":"- Open Chrome and check the version under Settings > About Chrome, or run `google-chrome --version` on Linux\n- Check managed fleets for Chrome builds older than `156.0.8078.73`","fix":"- Update Google Chrome to `156.0.8078.73` or later\n- Relaunch the browser after the update so the new version is running","status":"open","published_at":"2026-10-27T23:17:00+00:00","first_seen_at":"2026-10-27T23:29:43+00:00","triaged_at":"2026-10-27T23:32:02+00:00","updated_at":"2026-10-27T23:32:02+00:00","category":"other","confidence":0.7,"triage":{"at":"2026-10-27T23:32:02Z","model":"claude-haiku-5-5","output":{"fix":"- Update Google Chrome to `156.0.8078.73` or later\n- Relaunch the browser after the update so the new version is running","reach":"internet","title":"Chrome V8: crafted HTML page can run code outside the sandbox","impact":"high","summary":"Improper input validation in the V8 JavaScript engine in Google Chrome before 156.0.8078.73 lets a remote attacker run arbitrary code outside the browser sandbox. The attack is delivered through a crafted HTML page that a user visits.","category":"other","nicknames":[],"who_cares":["chrome","browsers","desktop","endpoints"],"confidence":0.7,"needs_auth":"no","worst_case":"Attacker runs code outside the browser sandbox on the user's machine","analyst_note":"Check the Chrome release notes or Chromium security advisory for the 156 branch to confirm the fixed version and any exploitation status.","how_to_check":"- Open Chrome and check the version under Settings > About Chrome, or run `google-chrome --version` on Linux\n- Check managed fleets for Chrome builds older than `156.0.8078.73`","needs_analyst":true,"not_affected_if":["already-updated","no-chrome-installed"],"who_is_affected":"Any machine running Google Chrome before `156.0.8078.73` is exposed when a user browses to a malicious page. Managed browsers that auto-update are usually patched already, but check fleets and kiosks that pin versions. Teams with no Chrome installs outside of Chromium-based tooling can skip it.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000612,"input_tokens":3295,"output_tokens":566,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-118316':14A,17A '-2026':13A,16A '156.0.8078.73':34B,69C 'allow':70C 'arbitrari':40B,77C 'attack':38B,47B,73C 'browser':18B,44B 'chrome':1A,19B,32B,66C 'chromium':87C 'code':8A,41B,78C 'craft':3A,52B,84C 'cve':12A,15A 'deliv':49B 'desktop':20B 'endpoint':21B 'engin':29B 'execut':76C 'googl':31B,65C 'high':90C 'html':4A,53B,85C 'improp':22B,59C 'input':23B,60C 'javascript':28B 'let':35B 'outsid':9A,42B,79C 'page':5A,54B,86C 'potenti':75C 'prior':67C 'remot':37B,72C 'run':7A,39B 'sandbox':11A,45B,81C 'secur':88C 'sever':89C 'user':57B 'v8':2A,27B,63C 'valid':24B,61C 'via':82C 'visit':58B","nicknames":[],"mitigations":[],"who_affected":"Any machine running Google Chrome before `156.0.8078.73` is exposed when a user browses to a malicious page. Managed browsers that auto-update are usually patched already, but check fleets and kiosks that pin versions. Teams with no Chrome installs outside of Chromium-based tooling can skip it.","tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-27T23:17:00+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-118316","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118316","severity":null,"published_at":"2026-10-27T23:17:00+00:00","modified_at":"2026-10-27T23:17:00+00:00","first_seen_at":"2026-10-27T23:29:43+00:00","fetched_at":"2026-10-27T23:29:43+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"}