---
id: "CVE-2026-121167"
kind: "vulnerability"
aliases: ["CVE-2026-121167"]
title: "Chrome: permissions check lets a compromised renderer bypass system access limits"
severity: "medium"
cvss: null
epss: null
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["browser", "chrome", "linux", "macos", "runtime", "windows"]
not_affected_if: ["auto-updated", "chrome-157-or-later"]
published_at: "2026-11-03T21:17:24+00:00"
first_seen_at: "2026-11-03T21:19:23+00:00"
updated_at: "2026-11-03T21:23:20+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-121167", "first_seen_at": "2026-11-03T21:19:23+00:00"}]
---

# Chrome: permissions check lets a compromised renderer bypass system access limits

Google Chrome before 157.0.8103.38 has an incorrect authorization flaw in its Permissions component. A remote attacker who already compromised the renderer process can use a crafted HTML page to 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://settings/help` shows the running version.
- Confirm whether it is below `157.0.8103.38`.

## Fix

- Google Chrome: `157.0.8103.38`

## Timeline

- 2026-11-03T21:19:23+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-121167

## From the sources

Incorrect authorization in Permissions in Google Chrome prior to 157.0.8103.38 allowed a remote attacker who had compromised the renderer process to bypass system access restrictions via a crafted HTML page. (Chromium security severity: Medium)

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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_