{"id":"CVE-2026-113021","kind":"vulnerability","aliases":["CVE-2026-113021"],"related":[],"title":"Chrome: use-after-free in web app installs lets a crafted page run code","description":"Use after free in WebAppInstalls in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: Low)","summary":"A memory bug in Google Chrome's WebAppInstalls code lets a remote attacker run arbitrary code inside the browser sandbox via a crafted HTML page. The sources rate it high (CVSS 8.8) while Chromium rates it low severity, and it is not known to be exploited in the wild.","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":["browser","chrome","desktop","other","package"],"not_affected_if":["already-on-156.0.8078.47-or-later"],"how_to_check":"Run chrome://version in the browser and check whether the version is below 156.0.8078.47.\nOn managed machines, check the installed Chrome version with the fleet tool in use.","fix":"Update Google Chrome to 156.0.8078.47 or later.\nRestart the browser after the update so the new build is running.","status":"open","published_at":"2026-10-20T22:18:52+00:00","first_seen_at":"2026-10-23T21:57:23+00:00","triaged_at":"2026-10-23T22:38:10+00:00","updated_at":"2026-10-23T22:38:10+00:00","category":"package","confidence":0.8,"triage":{"at":"2026-10-23T22:38:10Z","model":"claude-haiku-5-5","output":{"fix":"Update Google Chrome to 156.0.8078.47 or later.\nRestart the browser after the update so the new build is running.","reach":"internet","title":"Chrome: use-after-free in web app installs lets a crafted page run code","impact":"high","summary":"A memory bug in Google Chrome's WebAppInstalls code lets a remote attacker run arbitrary code inside the browser sandbox via a crafted HTML page. The sources rate it high (CVSS 8.8) while Chromium rates it low severity, and it is not known to be exploited in the wild.","category":"package","who_cares":["chrome","desktop","browser"],"confidence":0.8,"needs_auth":"no","worst_case":"Attacker code runs inside the Chrome sandbox after the user visits a page","analyst_note":"","how_to_check":"Run chrome://version in the browser and check whether the version is below 156.0.8078.47.\nOn managed machines, check the installed Chrome version with the fleet tool in use.\nunknown","needs_analyst":false,"not_affected_if":["already-on-156.0.8078.47-or-later"],"user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"unknown"},"cost_usd":0.000504,"input_tokens":2942,"output_tokens":419,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-113021':18A,21A '-2026':17A,20A '156.0.8078.47':88C '8.8':60B 'allow':89C 'app':8A 'arbitrari':43B,95C 'attack':41B,92C 'browser':24B,47B 'bug':31B 'chrome':1A,23A,25B,34B,85C 'chromium':62B,105C 'code':15A,37B,44B,96C 'craft':12A,51B,102C 'cve':16A,19A 'cvss':59B 'desktop':26B 'execut':94C 'exploit':74B 'free':5A,80C 'googl':33B,84C 'google':22A 'high':58B 'html':52B,103C 'insid':45B,97C 'instal':9A 'known':71B 'let':10A,38B 'low':65B,108C 'memori':30B 'packag':28B 'page':13A,53B,104C 'prior':86C 'rate':56B,63B 'remot':40B,91C 'run':14A,42B 'sandbox':48B,99C 'secur':106C 'sever':66B,107C 'sourc':55B 'use':3A,78C 'use-after-fre':2A 'via':49B,100C 'web':7A 'webappinstal':36B,82C 'wild':77B","nicknames":[],"mitigations":[],"who_affected":null,"tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T22:18:52+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-2026-113021","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-113021","severity":null,"published_at":"2026-10-20T22:18:52+00:00","modified_at":"2026-10-21T17:59:01+00:00","first_seen_at":"2026-10-23T21:57:23+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"}