{"id":"CVE-2026-113261","kind":"vulnerability","aliases":["CVE-2026-113261"],"related":[],"title":"Chrome: use-after-free in web app installs lets remote pages run code","description":"Use after free in WebAppInstalls in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Medium)","summary":"Google Chrome before 156.0.8078.47 has a use-after-free bug in its WebAppInstalls component. A remote attacker can use a crafted HTML page to potentially execute arbitrary code outside the browser sandbox.","severity":"critical","cvss":9.6,"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":["browsers","chrome","desktop","other","runtime"],"not_affected_if":[],"how_to_check":"Check the installed Chrome version against 156.0.8078.47 (chrome://version shows it). The sources do not give another check.","fix":"Update Google Chrome to 156.0.8078.47 or later.","status":"open","published_at":"2026-10-20T22:19:19+00:00","first_seen_at":"2026-10-23T21:57:24+00:00","triaged_at":"2026-10-23T22:35:42+00:00","updated_at":"2026-10-23T22:35:42+00:00","category":"other","confidence":0.8,"triage":{"at":"2026-10-23T22:35:42Z","model":"claude-haiku-5-5","output":{"fix":"Update Google Chrome to 156.0.8078.47 or later.","reach":"internet","title":"Chrome: use-after-free in web app installs lets remote pages run code","impact":"high","summary":"Google Chrome before 156.0.8078.47 has a use-after-free bug in its WebAppInstalls component. A remote attacker can use a crafted HTML page to potentially execute arbitrary code outside the browser sandbox.","category":"other","who_cares":["chrome","desktop","browsers"],"confidence":0.8,"needs_auth":"no","worst_case":"code runs outside browser sandbox via a crafted page","analyst_note":"Sources conflict: NVD gives CVSS 9.6 critical while the description cites Chromium severity Medium. Check the Chrome release notes or the NVD page at https://nvd.nist.gov/vuln/detail/CVE-2026-113261 for the official severity.","how_to_check":"Check the installed Chrome version against 156.0.8078.47 (chrome://version shows it). The sources do not give another check.","needs_analyst":true,"not_affected_if":[],"user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"unknown"},"cost_usd":0.000903,"input_tokens":2951,"output_tokens":1216,"severity_before":"critical"},"analyst_status":null,"analyst_note":null,"search":"'-113261':17A,20A '-2026':16A,19A '156.0.8078.47':31B,71C 'allow':72C 'app':8A 'arbitrari':55B,79C 'attack':45B,75C 'browser':23B,59B 'bug':38B 'chrome':1A,22A,24B,29B,68C 'chromium':89C 'code':14A,56B,80C 'compon':42B 'craft':49B,86C 'cve':15A,18A 'desktop':25B 'execut':54B,78C 'free':5A,37B,63C 'googl':28B,67C 'google':21A 'html':50B,87C 'instal':9A 'let':10A 'medium':92C 'outsid':57B,81C 'page':12A,51B,88C 'potenti':53B,77C 'prior':69C 'remot':11A,44B,74C 'run':13A 'runtim':27B 'sandbox':60B,83C 'secur':90C 'sever':91C 'use':3A,35B,47B,61C 'use-after-fre':2A,34B 'via':84C 'web':7A 'webappinstal':41B,65C","nicknames":[],"mitigations":[],"who_affected":null,"tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T22:19:19+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","cvss_by":"134c704f-9b21-4f2e-91b3-4a467353bcc0","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-113261","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-113261","severity":null,"published_at":"2026-10-20T22:19:19+00:00","modified_at":"2026-10-22T23:18:28+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"}