---
id: "CVE-2026-121112"
kind: "vulnerability"
aliases: ["CVE-2026-121112"]
title: "Chrome: out-of-bounds read in Permissions lets a compromised renderer escape"
severity: "high"
cvss: null
epss: null
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["browser", "chrome", "endpoints", "runtime"]
not_affected_if: ["chrome-at-or-above-157.0.8103.38"]
published_at: "2026-11-03T21:17:18+00:00"
first_seen_at: "2026-11-03T21:19:15+00:00"
updated_at: "2026-11-03T21:25:08+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-121112", "first_seen_at": "2026-11-03T21:19:15+00:00"}]
---

# Chrome: out-of-bounds read in Permissions lets a compromised renderer escape

A flaw in the Permissions component of Google Chrome lets code that has already compromised the renderer process read memory out of bounds. An attacker who gets there via a crafted HTML page could potentially run code outside the browser sandbox.

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

## How to check

- Check the Chrome version in the browser's About page or with `chrome://version`; affected builds are prior to `157.0.8103.38`.
- Check managed fleets for the Chrome version reported by the endpoint management tool.

## Fix

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

## Timeline

- 2026-11-03T21:19:15+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-121112

## From the sources

Out of bounds read in Permissions in Google Chrome prior to 157.0.8103.38 allowed a remote attacker who had compromised the renderer process to potentially execute arbitrary code 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_