---
id: "CVE-2026-121064"
kind: "vulnerability"
aliases: ["CVE-2026-121064"]
title: "Google Chrome: input validation flaw lets local program escape sandbox"
severity: "low"
cvss: null
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["browser", "chrome", "desktop", "package"]
not_affected_if: ["chrome-157.0.8103.38-or-later", "no-local-untrusted-code"]
published_at: "2026-11-03T21:17:11+00:00"
first_seen_at: "2026-11-03T21:19:11+00:00"
updated_at: "2026-11-03T21:27:04+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-121064", "first_seen_at": "2026-11-03T21:19:11+00:00"}]
---

# Google Chrome: input validation flaw lets local program escape sandbox

Google Chrome has an improper input validation flaw in its Performance component. A local program can use it to potentially execute arbitrary code inside the browser sandbox.

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

## How to check

- Check the installed Chrome version in the browser's About page or with `chrome --version`
- Confirm whether it is older than `157.0.8103.38`

## Fix

- Google Chrome: move to `157.0.8103.38` or later

## Timeline

- 2026-11-03T21:19:11+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-121064

## From the sources

Improper input validation in Performance in Google Chrome prior to 157.0.8103.38 allowed a local attacker to potentially execute arbitrary code inside the sandbox via a local program. (Chromium security severity: Low)

---

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