---
id: "CVE-2026-125343"
page: "https://infrastack.ai/live/CVE-2026-125343"
kind: "vulnerability"
aliases: ["CVE-2026-125343"]
title: "Chrome: compositing buffer overflow lets a compromised renderer escape the sandbox"
severity: "high"
cvss: null
epss: null
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["browsers", "chrome", "desktop", "runtime"]
not_affected_if: ["chrome-updated", "no-untrusted-browsing"]
published_at: "2026-11-10T18:17:34+00:00"
first_seen_at: "2026-11-10T18:22:56+00:00"
updated_at: "2026-11-10T18:26:45+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-125343", "first_seen_at": "2026-11-10T18:22:56+00:00"}]
exploit_sources: []
---

# Chrome: compositing buffer overflow lets a compromised renderer escape the sandbox

Link for people: https://infrastack.ai/live/CVE-2026-125343 (this .md is for agents)

A buffer overflow in Chrome's Compositing component lets an attacker who already controls the renderer process run arbitrary code outside the browser sandbox. The attacker delivers the trigger through a crafted HTML page.

_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 `google-chrome --version`
- Compare it against the fixed version `157.0.8103.50`
- On managed fleets, query the Chrome version reported by the device management console

## Fix

- Google Chrome: move to `157.0.8103.50` or later

## Timeline

- 2026-11-10T18:22:56+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-125343

## From the sources

Buffer overflow in Compositing in Google Chrome prior to 157.0.8103.50 allowed a remote attacker who had compromised the renderer process to execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: High)

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_