---
id: "CVE-2026-113129"
kind: "vulnerability"
aliases: ["CVE-2026-113129"]
title: "Google Chrome: extension access flaw leaks data via crafted HTML page"
severity: "medium"
cvss: 6.5
epss: null
exploited: false
status: "open"
category: "vendor"
products: [{"name": "google chrome", "fixed": ["156.0.8078.47"], "affected": "< 156.0.8078.47", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["browsers", "chrome", "endpoints", "managed-fleets", "vendor"]
not_affected_if: ["chrome-156.0.8078.47-or-later"]
published_at: "2026-10-20T22:19:05+00:00"
first_seen_at: "2026-10-23T21:57:24+00:00"
updated_at: "2026-10-25T03:53:14+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-113129", "first_seen_at": "2026-10-23T21:57:24+00:00"}]
---

# Google Chrome: extension access flaw leaks data via crafted HTML page

Google Chrome versions before 156.0.8078.47 have an improper access control flaw in Extensions. A remote attacker who lures a user to a crafted HTML page could potentially leak sensitive information.

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

## Affected

- vendor:google chrome affected < 156.0.8078.47 fixed 156.0.8078.47

## How to check

- Run `chrome://version` in Chrome and compare the version to `156.0.8078.47`
- On managed fleets, check the Chrome version reported by your device management console

## Fix

- Update Google Chrome to `156.0.8078.47` or later
- Restart the browser after the update so the new version is running

## Timeline

- 2026-10-23T21:57:24+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-113129

## From the sources

Improper access control in Extensions in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to potentially leak sensitive information 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_