---
id: "CVE-2026-121080"
kind: "vulnerability"
aliases: ["CVE-2026-121080"]
title: "Chrome: codec use-after-free lets a crafted web page read sandbox memory"
severity: "high"
cvss: null
epss: null
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["browsers", "chrome", "chromium", "desktop", "runtime"]
not_affected_if: ["auto-update-enabled", "chrome-updated"]
published_at: "2026-11-03T21:17:13+00:00"
first_seen_at: "2026-11-03T21:19:12+00:00"
updated_at: "2026-11-03T21:26:49+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-121080", "first_seen_at": "2026-11-03T21:19:12+00:00"}]
---

# Chrome: codec use-after-free lets a crafted web page read sandbox memory

A use-after-free bug in Chrome's Codecs component lets a remote attacker read memory inside the browser sandbox when a 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

- Open Chrome and check the version under Help > About Google Chrome, or run `chrome://version` in the address bar.
- Compare the installed version against `157.0.8103.38`.

## Fix

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

## Timeline

- 2026-11-03T21:19:12+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-121080

## From the sources

Use after free in Codecs in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to read memory inside the sandbox via a crafted HTML page. (Chromium security severity: High)

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