---
id: "CVE-2026-121208"
kind: "vulnerability"
aliases: ["CVE-2026-121208"]
title: "Chrome: out-of-bounds read in Media lets a web page run code"
severity: "high"
cvss: null
epss: null
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["browsers", "chrome", "linux", "macos", "runtime", "windows"]
not_affected_if: ["patched-chrome"]
published_at: "2026-11-03T21:17:30+00:00"
first_seen_at: "2026-11-03T21:19:26+00:00"
updated_at: "2026-11-03T21:22:41+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-121208", "first_seen_at": "2026-11-03T21:19:26+00:00"}]
---

# Chrome: out-of-bounds read in Media lets a web page run code

A memory read past the end of a buffer in Chrome's Media component lets a remote attacker run code inside the browser sandbox via 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

- Open Chrome and check the version under Settings > About Chrome; the flaw affects versions before `157.0.8103.38`.

## Fix

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

## Timeline

- 2026-11-03T21:19:26+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-121208

## From the sources

Out of bounds read in Media in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to potentially 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_