---
id: "CVE-2026-121047"
kind: "vulnerability"
aliases: ["CVE-2026-121047"]
title: "Chrome: media buffer overflow lets a crafted web page run code"
severity: "high"
cvss: null
epss: null
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["browser", "chrome", "desktop", "managed-fleet", "runtime"]
not_affected_if: ["chrome-up-to-date"]
published_at: "2026-11-03T21:17:09+00:00"
first_seen_at: "2026-11-03T21:19:10+00:00"
updated_at: "2026-11-03T21:27:21+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-121047", "first_seen_at": "2026-11-03T21:19:10+00:00"}]
---

# Chrome: media buffer overflow lets a crafted web page run code

A buffer overflow in the Media component of Google Chrome before 157.0.8103.38 lets a remote attacker run arbitrary code inside the browser sandbox when the victim opens a crafted HTML page. Chromium rates it High severity.

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

## How to check

- Check the installed Chrome version by opening `chrome://settings/help` or running `google-chrome --version` on Linux.
- Compare the result against `157.0.8103.38`; anything lower is affected.

## Fix

- Google Chrome: update to `157.0.8103.38` or later.

## Timeline

- 2026-11-03T21:19:10+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-121047

## From the sources

Buffer overflow in Media in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to execute arbitrary code 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_