{"id":"CVE-2026-113277","kind":"vulnerability","aliases":["CVE-2026-113277"],"related":[],"title":"Chrome on Android: out-of-bounds read in CustomTabs leaks sandbox memory","description":"Out of bounds read in CustomTabs in Google Chrome on on Android prior to 156.0.8078.47 allowed a remote attacker to read memory inside the sandbox via a crafted HTML page. (Chromium security severity: Medium)","summary":"A flaw in the CustomTabs component of Google Chrome on Android lets a crafted HTML page make the browser read memory outside a buffer. The sources say the read stays inside the sandbox, so an attacker gets some memory contents rather than code execution.","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":["android","chrome","mobile","vendor"],"not_affected_if":["chrome-up-to-date"],"how_to_check":"- Open Chrome on Android and check the version under Settings > About Chrome; it should be `156.0.8078.47` or later.\n- Check the installed version with `adb shell dumpsys package com.android.chrome | grep versionName` where a device is attached.","fix":"- Update Google Chrome on Android to `156.0.8078.47` or later through Google Play.","status":"open","published_at":"2026-10-20T22:19:21+00:00","first_seen_at":"2026-10-23T21:57:24+00:00","triaged_at":"2026-10-25T03:52:58+00:00","updated_at":"2026-10-25T03:52:58+00:00","category":"vendor","confidence":0.6,"triage":{"at":"2026-10-25T03:52:58Z","model":"claude-haiku-5-5","output":{"fix":"- Update Google Chrome on Android to `156.0.8078.47` or later through Google Play.","reach":"internet","title":"Chrome on Android: out-of-bounds read in CustomTabs leaks sandbox memory","impact":"low","summary":"A flaw in the CustomTabs component of Google Chrome on Android lets a crafted HTML page make the browser read memory outside a buffer. The sources say the read stays inside the sandbox, so an attacker gets some memory contents rather than code execution.","category":"vendor","nicknames":[],"who_cares":["chrome","android","mobile"],"confidence":0.6,"needs_auth":"no","worst_case":"Attacker reads some browser process memory inside the sandbox.","analyst_note":"","how_to_check":"- Open Chrome on Android and check the version under Settings > About Chrome; it should be `156.0.8078.47` or later.\n- Check the installed version with `adb shell dumpsys package com.android.chrome | grep versionName` where a device is attached.","needs_analyst":false,"not_affected_if":["chrome-up-to-date"],"who_is_affected":"Users of Google Chrome on Android running a version before `156.0.8078.47`. Anyone who opens untrusted web pages in Chrome or in a Custom Tab from another app is in scope. Devices on a current Chrome build can skip it.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"medium"},"cost_usd":0.000587,"input_tokens":3342,"output_tokens":505,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-113277':16A,19A '-2026':15A,18A '156.0.8078.47':84C 'allow':85C 'android':3A,22B,36B,81C 'attack':61B,88C 'bound':7A,72C 'browser':44B 'buffer':49B 'chrome':1A,21A,23B,34B,78C 'chromium':100C 'code':68B 'compon':31B 'content':65B 'craft':39B,97C 'customtab':10A,30B,75C 'cve':14A,17A 'execut':69B 'flaw':27B 'get':62B 'googl':33B,77C 'google':20A 'html':40B,98C 'insid':56B,92C 'leak':11A 'let':37B 'make':42B 'medium':103C 'memori':13A,46B,64B,91C 'mobil':24B 'out-of-bound':4A 'outsid':47B 'page':41B,99C 'prior':82C 'rather':66B 'read':8A,45B,54B,73C,90C 'remot':87C 'sandbox':12A,58B,94C 'say':52B 'secur':101C 'sever':102C 'sourc':51B 'stay':55B 'vendor':25B 'via':95C","nicknames":[],"mitigations":[],"who_affected":"Users of Google Chrome on Android running a version before `156.0.8078.47`. Anyone who opens untrusted web pages in Chrome or in a Custom Tab from another app is in scope. Devices on a current Chrome build can skip it.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T22:19:21+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-2026-113277","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-113277","severity":null,"published_at":"2026-10-20T22:19:21+00:00","modified_at":"2026-10-22T12:05:11+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"}