{"id":"CVE-2026-118307","kind":"vulnerability","aliases":["CVE-2026-118307"],"related":[],"title":"Chrome: use-after-free in Paint lets crafted page run code in sandbox","description":"Use after free in Paint in Google Chrome prior to 156.0.8078.73 allowed a remote attacker to potentially execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: High)","summary":"A use-after-free bug in the Paint component of Google Chrome before 156.0.8078.73 can be triggered by a crafted HTML page. A remote attacker could potentially execute arbitrary code inside the browser sandbox.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browser","chrome","desktop","runtime"],"not_affected_if":["up-to-date-chrome"],"how_to_check":"- Check the installed Chrome version in the browser's About page or with `google-chrome --version`, and compare against `156.0.8078.73`.","fix":"- Update Google Chrome to `156.0.8078.73` or later.","status":"open","published_at":"2026-10-27T23:16:59+00:00","first_seen_at":"2026-10-27T23:29:42+00:00","triaged_at":"2026-10-27T23:32:11+00:00","updated_at":"2026-10-27T23:32:11+00:00","category":"runtime","confidence":0.7,"triage":{"at":"2026-10-27T23:32:11Z","model":"claude-haiku-5-5","output":{"fix":"- Update Google Chrome to `156.0.8078.73` or later.","reach":"internet","title":"Chrome: use-after-free in Paint lets crafted page run code in sandbox","impact":"high","summary":"A use-after-free bug in the Paint component of Google Chrome before 156.0.8078.73 can be triggered by a crafted HTML page. A remote attacker could potentially execute arbitrary code inside the browser sandbox.","category":"runtime","nicknames":[],"who_cares":["chrome","desktop","browser"],"confidence":0.7,"needs_auth":"no","worst_case":"Attacker code runs inside the browser sandbox after a visit to a crafted page.","analyst_note":"","how_to_check":"- Check the installed Chrome version in the browser's About page or with `google-chrome --version`, and compare against `156.0.8078.73`.","needs_analyst":false,"not_affected_if":["up-to-date-chrome"],"who_is_affected":"Anyone running Google Chrome older than 156.0.8078.73 on desktop machines. Visiting an attacker-controlled web page is enough to reach the flawed code, so any browsing user is in scope. Machines already on a current Chrome build can skip it.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000559,"input_tokens":3293,"output_tokens":459,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-118307':17A,20A '-2026':16A,19A '156.0.8078.73':39B,70C 'allow':71C 'arbitrari':54B,78C 'attack':50B,74C 'browser':21B,58B 'bug':30B 'chrome':1A,22B,37B,67C 'chromium':88C 'code':12A,55B,79C 'compon':34B 'could':51B 'craft':9A,45B,85C 'cve':15A,18A 'desktop':23B 'execut':53B,77C 'free':5A,29B,62C 'googl':36B,66C 'high':91C 'html':46B,86C 'insid':56B,80C 'let':8A 'page':10A,47B,87C 'paint':7A,33B,64C 'potenti':52B,76C 'prior':68C 'remot':49B,73C 'run':11A 'runtim':24B 'sandbox':14A,59B,82C 'secur':89C 'sever':90C 'trigger':42B 'use':3A,27B,60C 'use-after-fre':2A,26B 'via':83C","nicknames":[],"mitigations":[],"who_affected":"Anyone running Google Chrome older than 156.0.8078.73 on desktop machines. Visiting an attacker-controlled web page is enough to reach the flawed code, so any browsing user is in scope. Machines already on a current Chrome build can skip it.","tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-27T23:16:59+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-118307","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118307","severity":null,"published_at":"2026-10-27T23:16:59+00:00","modified_at":"2026-10-27T23:16:59+00:00","first_seen_at":"2026-10-27T23:29:42+00:00","fetched_at":"2026-10-27T23:29:42+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"}