---
id: "CVE-2026-113277"
kind: "vulnerability"
aliases: ["CVE-2026-113277"]
title: "Chrome on Android: out-of-bounds read in CustomTabs leaks sandbox memory"
severity: "medium"
cvss: 6.5
epss: null
exploited: false
status: "open"
category: "vendor"
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"]
published_at: "2026-10-20T22:19:21+00:00"
first_seen_at: "2026-10-23T21:57:24+00:00"
updated_at: "2026-10-25T03:52:58+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-113277", "first_seen_at": "2026-10-23T21:57:24+00:00"}]
---

# Chrome on Android: out-of-bounds read in CustomTabs leaks sandbox memory

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.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:google chrome affected < 156.0.8078.47 fixed 156.0.8078.47

## How to check

- Open Chrome on Android and check the version under Settings > About Chrome; it should be `156.0.8078.47` or later.
- 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.

## Timeline

- 2026-10-23T21:57:24+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-113277

## From the sources

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)

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_