---
id: "CVE-2026-113309"
kind: "vulnerability"
aliases: ["CVE-2026-113309"]
title: "Google Chrome: out-of-bounds read in Media lets a crafted page read sandbox memory"
severity: "medium"
cvss: 6.5
epss: null
exploited: false
status: "open"
category: "other"
products: [{"name": "google chrome", "fixed": ["156.0.8078.47"], "affected": "< 156.0.8078.47", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["browsers", "chrome", "desktop", "managed-endpoints", "other"]
not_affected_if: ["already-on-156.0.8078.47-or-later"]
published_at: "2026-10-20T22:19:25+00:00"
first_seen_at: "2026-10-23T21:57:24+00:00"
updated_at: "2026-10-25T03:52:54+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-113309", "first_seen_at": "2026-10-23T21:57:24+00:00"}]
---

# Google Chrome: out-of-bounds read in Media lets a crafted page read sandbox memory

A bug in Chrome's Media component lets a remote attacker read memory inside the browser sandbox when a victim opens a crafted HTML page. The sources say the read is limited to sandbox memory, so it is an information-disclosure step rather than direct 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

- Run `chrome://version` in Chrome and compare the version to `156.0.8078.47`.
- On managed fleets, query the installed Chrome version with your device management tool and flag anything below `156.0.8078.47`.

## Fix

- Update Google Chrome to `156.0.8078.47` or later.
- Relaunch the browser after the update so the fixed build is running.

## Timeline

- 2026-10-23T21:57:24+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-113309

## From the sources

Out of bounds read in Media in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to read memory inside the sandbox via a crafted HTML page. (Chromium security severity: High)

---

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