{"id":"CVE-2026-118338","kind":"vulnerability","aliases":["CVE-2026-118338"],"related":[],"title":"Chrome: use-after-free in Animation lets a crafted page run code in sandbox","description":"Use after free in Animation 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: Medium)","summary":"A use-after-free bug in the Animation 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":"medium","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","chrome","endpoints","other"],"not_affected_if":["chrome-updated","non-chromium-browser"],"how_to_check":"- Open chrome://version in Chrome and read the version number, then compare it with `156.0.8078.73`\n- On managed machines, check the installed Chrome version with your endpoint tool","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":"2026-10-27T23:17:02+00:00","first_seen_at":"2026-10-27T23:29:43+00:00","triaged_at":"2026-10-27T23:31:45+00:00","updated_at":"2026-10-27T23:31:45+00:00","category":"other","confidence":0.7,"triage":{"at":"2026-10-27T23:31:45Z","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: use-after-free in Animation lets a crafted page run code in sandbox","impact":"medium","summary":"A use-after-free bug in the Animation 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":"other","nicknames":[],"who_cares":["chrome","browsers","endpoints"],"confidence":0.7,"needs_auth":"no","worst_case":"Attacker code runs inside the browser sandbox after a crafted page visit","analyst_note":"","how_to_check":"- Open chrome://version in Chrome and read the version number, then compare it with `156.0.8078.73`\n- On managed machines, check the installed Chrome version with your endpoint tool","needs_analyst":false,"not_affected_if":["chrome-updated","non-chromium-browser"],"who_is_affected":"Anyone running Google Chrome before 156.0.8078.73 who visits web pages, including untrusted ones. The sources do not mention server-side or managed-only exposure, so the risk is for browsers on user machines and any kiosk or shared browser profiles. Teams that do not run Chrome on their fleet can skip it.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"medium"},"cost_usd":0.000589,"input_tokens":3295,"output_tokens":520,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-118338':18A,21A '-2026':17A,20A '156.0.8078.73':39B,70C 'allow':71C 'anim':7A,33B,64C 'arbitrari':54B,78C 'attack':50B,74C 'browser':22B,58B 'bug':30B 'chrome':1A,23B,37B,67C 'chromium':88C 'code':13A,55B,79C 'compon':34B 'could':51B 'craft':10A,45B,85C 'cve':16A,19A 'endpoint':24B 'execut':53B,77C 'free':5A,29B,62C 'googl':36B,66C 'html':46B,86C 'insid':56B,80C 'let':8A 'medium':91C 'page':11A,47B,87C 'potenti':52B,76C 'prior':68C 'remot':49B,73C 'run':12A 'sandbox':15A,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 before 156.0.8078.73 who visits web pages, including untrusted ones. The sources do not mention server-side or managed-only exposure, so the risk is for browsers on user machines and any kiosk or shared browser profiles. Teams that do not run Chrome on their fleet can skip it.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-27T23:17:02+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-118338","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118338","severity":null,"published_at":"2026-10-27T23:17:02+00:00","modified_at":"2026-10-27T23:17:02+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"}