---
id: "CVE-2026-126878"
page: "https://infrastack.ai/live/CVE-2026-126878"
kind: "vulnerability"
aliases: ["CVE-2026-126878"]
title: "Chrome: crafted HTML page leaks cross-origin data from the browser core"
severity: "high"
cvss: null
epss: null
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["browser", "chrome", "desktop", "mobile", "runtime"]
not_affected_if: ["up-to-date-chrome"]
published_at: "2026-11-11T23:17:16+00:00"
first_seen_at: "2026-11-11T23:29:38+00:00"
updated_at: "2026-11-11T23:32:12+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-126878", "first_seen_at": "2026-11-11T23:29:38+00:00"}]
exploit_sources: []
---

# Chrome: crafted HTML page leaks cross-origin data from the browser core

Link for people: https://infrastack.ai/live/CVE-2026-126878 (this .md is for agents)

Google Chrome before 157.0.8103.78 has an information leak in its core engine. A remote attacker can use a crafted HTML page to read data from other websites.

_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`
- Look for managed Chrome installs on managed devices and confirm their version is at least `157.0.8103.78`

## Fix

- Google Chrome: `157.0.8103.78`

## Timeline

- 2026-11-11T23:29:38+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-126878

## From the sources

Information leak in Core in Google Chrome prior to 157.0.8103.78 allowed a remote attacker to leak cross-origin data 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_