{"id":"CVE-2026-118328","kind":"vulnerability","aliases":["CVE-2026-118328"],"related":[],"title":"Chrome: WebRTC input validation flaw lets a crafted page run code in sandbox","description":"Improper input validation in WebRTC 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":"Google Chrome versions before 156.0.8078.73 have an improper input validation bug in WebRTC. A remote attacker who lures a user to a crafted HTML page can potentially execute arbitrary code inside the browser sandbox.","severity":"high","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 and check the version under Settings > About Chrome, or run `chrome --version` where the binary is available.\n- Confirm whether the installed version is below `156.0.8078.73`.","fix":"- Update Google Chrome to `156.0.8078.73` or later.\n- Relaunch the browser after the update so the fix takes effect.","status":"open","published_at":"2026-10-27T23:17:01+00:00","first_seen_at":"2026-10-27T23:29:43+00:00","triaged_at":"2026-10-27T23:31:55+00:00","updated_at":"2026-10-27T23:31:55+00:00","category":"other","confidence":0.6,"triage":{"at":"2026-10-27T23:31:55Z","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 fix takes effect.","reach":"internet","title":"Chrome: WebRTC input validation flaw lets a crafted page run code in sandbox","impact":"medium","summary":"Google Chrome versions before 156.0.8078.73 have an improper input validation bug in WebRTC. A remote attacker who lures a user to a crafted HTML page can potentially execute arbitrary code inside the browser sandbox.","category":"other","nicknames":[],"who_cares":["chrome","browsers","endpoints"],"confidence":0.6,"needs_auth":"no","worst_case":"Attacker runs code inside the browser sandbox after a victim visits a page.","analyst_note":"Check the Chrome release notes for 156.0.8078.73 and the Chromium bug entry to confirm the affected component and whether a sandbox escape is also needed.","how_to_check":"- Open Chrome and check the version under Settings > About Chrome, or run `chrome --version` where the binary is available.\n- Confirm whether the installed version is below `156.0.8078.73`.","needs_analyst":true,"not_affected_if":["chrome-updated","non-chromium-browser"],"who_is_affected":"Any user or managed fleet running Google Chrome before `156.0.8078.73` is exposed when they visit a malicious page. Teams that only run Chromium builds from other vendors should check those vendors' fixes instead. Servers and automated pipelines that do not browse untrusted content are less exposed.","user_interaction":"yes","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.00062,"input_tokens":3299,"output_tokens":580,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-118328':16A,19A '-2026':15A,18A '156.0.8078.73':27B,67C 'allow':68C 'arbitrari':51B,75C 'attack':38B,71C 'browser':20B,55B 'bug':33B 'chrome':1A,21B,24B,64C 'chromium':85C 'code':11A,52B,76C 'craft':8A,45B,82C 'cve':14A,17A 'endpoint':22B 'execut':50B,74C 'flaw':5A 'googl':23B,63C 'high':88C 'html':46B,83C 'improp':30B,57C 'input':3A,31B,58C 'insid':53B,77C 'let':6A 'lure':40B 'page':9A,47B,84C 'potenti':49B,73C 'prior':65C 'remot':37B,70C 'run':10A 'sandbox':13A,56B,79C 'secur':86C 'sever':87C 'user':42B 'valid':4A,32B,59C 'version':25B 'via':80C 'webrtc':2A,35B,61C","nicknames":[],"mitigations":[],"who_affected":"Any user or managed fleet running Google Chrome before `156.0.8078.73` is exposed when they visit a malicious page. Teams that only run Chromium builds from other vendors should check those vendors' fixes instead. Servers and automated pipelines that do not browse untrusted content are less exposed.","tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-27T23:17:01+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-118328","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118328","severity":null,"published_at":"2026-10-27T23:17:01+00:00","modified_at":"2026-10-27T23:17:01+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"}