{"id":"CVE-2026-113147","kind":"vulnerability","aliases":["CVE-2026-113147"],"related":[],"title":"Chrome: WebShare input flaw lets a crafted page run code in sandbox","description":"Improper input validation in WebShare in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to potentially execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: Medium)","summary":"A crafted HTML page can exploit improper input validation in Chrome's WebShare feature to execute arbitrary code inside the browser sandbox. The sources do not say it escapes the sandbox.","severity":"high","cvss":8.8,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"google chrome","fixed":["156.0.8078.47"],"affected":"< 156.0.8078.47","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["chrome","desktop-browser","linux","macos","runtime","windows"],"not_affected_if":["already-on-156.0.8078.47-or-later"],"how_to_check":"Run chrome://version and compare the version to 156.0.8078.47.\nOn managed fleets, query the installed Chrome version with your MDM or package manager.","fix":"Update Google Chrome to 156.0.8078.47 or later.\nRestart the browser after updating so the new version is running.","status":"open","published_at":"2026-10-20T22:19:07+00:00","first_seen_at":"2026-10-23T21:57:24+00:00","triaged_at":"2026-10-23T22:36:49+00:00","updated_at":"2026-10-23T22:36:49+00:00","category":"runtime","confidence":0.7,"triage":{"at":"2026-10-23T22:36:49Z","model":"claude-haiku-5-5","output":{"fix":"Update Google Chrome to 156.0.8078.47 or later.\nRestart the browser after updating so the new version is running.","reach":"internet","title":"Chrome: WebShare input flaw lets a crafted page run code in sandbox","impact":"high","summary":"A crafted HTML page can exploit improper input validation in Chrome's WebShare feature to execute arbitrary code inside the browser sandbox. The sources do not say it escapes the sandbox.","category":"runtime","who_cares":["chrome","desktop-browser","windows","macos","linux"],"confidence":0.7,"needs_auth":"no","worst_case":"Attacker runs code inside the browser sandbox after a user visits a page.","analyst_note":"","how_to_check":"Run chrome://version and compare the version to 156.0.8078.47.\nOn managed fleets, query the installed Chrome version with your MDM or package manager.","needs_analyst":false,"not_affected_if":["already-on-156.0.8078.47-or-later"],"user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000487,"input_tokens":2951,"output_tokens":384,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-113147':15A,18A '-2026':14A,17A '156.0.8078.47':70C 'allow':71C 'arbitrari':45B,78C 'attack':74C 'browser':24B,49B 'chrome':1A,20A,21B,39B,67C 'chromium':88C 'code':10A,46B,79C 'craft':7A,30B,85C 'cve':13A,16A 'desktop':23B 'desktop-brows':22B 'escap':57B 'execut':44B,77C 'exploit':34B 'featur':42B 'flaw':4A 'googl':66C 'google':19A 'html':31B,86C 'improp':35B,60C 'input':3A,36B,61C 'insid':47B,80C 'let':5A 'linux':25B 'maco':26B 'medium':91C 'page':8A,32B,87C 'potenti':76C 'prior':68C 'remot':73C 'run':9A 'runtim':27B 'sandbox':12A,50B,59B,82C 'say':55B 'secur':89C 'sever':90C 'sourc':52B 'valid':37B,62C 'via':83C 'webshar':2A,41B,64C 'window':28B","nicknames":[],"mitigations":[],"who_affected":null,"tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T22:19:07+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cvss_by":"134c704f-9b21-4f2e-91b3-4a467353bcc0","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-113147","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-113147","severity":null,"published_at":"2026-10-20T22:19:07+00:00","modified_at":"2026-10-22T23:18:27+00:00","first_seen_at":"2026-10-23T21:57:24+00:00","fetched_at":"2026-10-23T22:28:59+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"}