{"id":"CVE-2026-113129","kind":"vulnerability","aliases":["CVE-2026-113129"],"related":[],"title":"Google Chrome: extension access flaw leaks data via crafted HTML page","description":"Improper access control in Extensions in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to potentially leak sensitive information via a crafted HTML page. (Chromium security severity: Medium)","summary":"Google Chrome versions before 156.0.8078.47 have an improper access control flaw in Extensions. A remote attacker who lures a user to a crafted HTML page could potentially leak sensitive information.","severity":"medium","cvss":6.5,"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","endpoints","managed-fleets","vendor"],"not_affected_if":["chrome-156.0.8078.47-or-later"],"how_to_check":"- Run `chrome://version` in Chrome and compare the version to `156.0.8078.47`\n- On managed fleets, check the Chrome version reported by your device management console","fix":"- Update Google Chrome to `156.0.8078.47` or later\n- Restart the browser after the update so the new version is running","status":"open","published_at":"2026-10-20T22:19:05+00:00","first_seen_at":"2026-10-23T21:57:24+00:00","triaged_at":"2026-10-25T03:53:14+00:00","updated_at":"2026-10-25T03:53:14+00:00","category":"vendor","confidence":0.6,"triage":{"at":"2026-10-25T03:53:14Z","model":"claude-haiku-5-5","output":{"fix":"- Update Google Chrome to `156.0.8078.47` or later\n- Restart the browser after the update so the new version is running","reach":"internet","title":"Google Chrome: extension access flaw leaks data via crafted HTML page","impact":"low","summary":"Google Chrome versions before 156.0.8078.47 have an improper access control flaw in Extensions. A remote attacker who lures a user to a crafted HTML page could potentially leak sensitive information.","category":"vendor","nicknames":[],"who_cares":["chrome","browsers","endpoints","managed-fleets"],"confidence":0.6,"needs_auth":"no","worst_case":"Sensitive information leaks to a remote attacker via a crafted page","analyst_note":"","how_to_check":"- Run `chrome://version` in Chrome and compare the version to `156.0.8078.47`\n- On managed fleets, check the Chrome version reported by your device management console","needs_analyst":false,"not_affected_if":["chrome-156.0.8078.47-or-later"],"who_is_affected":"Any user running Google Chrome before 156.0.8078.47 is exposed, since the flaw is triggered by visiting a crafted HTML page. Organisations that manage browsers centrally should check fleet versions; the sources do not say whether specific extensions or configurations are required.","user_interaction":"yes","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.00058,"input_tokens":3326,"output_tokens":494,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-113129':14A,17A '-2026':13A,16A '156.0.8078.47':31B,67C 'access':4A,35B,58C 'allow':68C 'attack':42B,71C 'browser':20B 'chrome':2A,19A,21B,28B,64C 'chromium':82C 'control':36B,59C 'could':52B 'craft':9A,49B,79C 'cve':12A,15A 'data':7A 'endpoint':22B 'extens':3A,39B,61C 'flaw':5A,37B 'fleet':25B 'googl':1A,27B,63C 'google':18A 'html':10A,50B,80C 'improp':34B,57C 'inform':56B,76C 'leak':6A,54B,74C 'lure':44B 'manag':24B 'managed-fleet':23B 'medium':85C 'page':11A,51B,81C 'potenti':53B,73C 'prior':65C 'remot':41B,70C 'secur':83C 'sensit':55B,75C 'sever':84C 'user':46B 'vendor':26B 'version':29B 'via':8A,77C","nicknames":[],"mitigations":[],"who_affected":"Any user running Google Chrome before 156.0.8078.47 is exposed, since the flaw is triggered by visiting a crafted HTML page. Organisations that manage browsers centrally should check fleet versions; the sources do not say whether specific extensions or configurations are required.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T22:19:05+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","cvss_by":"134c704f-9b21-4f2e-91b3-4a467353bcc0","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-113129","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-113129","severity":null,"published_at":"2026-10-20T22:19:05+00:00","modified_at":"2026-10-21T16:15:32+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"}