---
id: "CVE-2026-121240"
kind: "vulnerability"
aliases: ["CVE-2026-121240"]
title: "Chrome: crafted network traffic can bypass system access restrictions"
severity: "low"
cvss: null
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["browser", "chrome", "desktop", "package"]
not_affected_if: ["chrome-at-or-above-157.0.8103.38"]
published_at: "2026-11-03T21:17:34+00:00"
first_seen_at: "2026-11-03T21:19:28+00:00"
updated_at: "2026-11-03T21:21:09+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-121240", "first_seen_at": "2026-11-03T21:19:28+00:00"}]
---

# Chrome: crafted network traffic can bypass system access restrictions

Google Chrome before 157.0.8103.38 mishandles input in its Variations feature, which delivers configuration to the browser. A remote attacker sending crafted network traffic can bypass system access restrictions.

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

## How to check

- Check the installed Chrome version (`chrome://version` in the browser)
- Compare it with the fixed version `157.0.8103.38`

## Fix

- Google Chrome: `157.0.8103.38`

## Timeline

- 2026-11-03T21:19:28+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-121240

## From the sources

Improper input validation in Variations in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to bypass system access restrictions via crafted network traffic. (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_