---
id: "CVE-2026-121173"
kind: "vulnerability"
aliases: ["CVE-2026-121173"]
title: "Chrome: WebGL uninitialized memory lets a crafted web page read memory"
severity: "high"
cvss: null
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["browsers", "chrome", "endpoints", "package", "webgl"]
not_affected_if: ["chrome-updated"]
published_at: "2026-11-03T21:17:25+00:00"
first_seen_at: "2026-11-03T21:19:24+00:00"
updated_at: "2026-11-03T21:23:15+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-121173", "first_seen_at": "2026-11-03T21:19:24+00:00"}]
---

# Chrome: WebGL uninitialized memory lets a crafted web page read memory

Google Chrome's WebGL code uses a resource before it is initialized, so a crafted HTML page can read memory outside the browser sandbox. Chromium rates it High severity.

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

## How to check

- Open the Chrome menu, go to Help, then About Google Chrome, and read the version number
- Compare it with `157.0.8103.38`; anything lower is affected

## Fix

- Google Chrome: move to `157.0.8103.38` or later

## Timeline

- 2026-11-03T21:19:24+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-121173

## From the sources

Uninitialized resource in WebGL in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to read memory outside 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_