---
id: CVE-2026-113103
title: >-
  chromium-browser: chromium-browser: arbitrary code execution in WebProtect via
  crafted HTML page (CVE-2026-113103)
summary: >-
  A flaw was found in chromium-browser. A remote attacker can exploit a
  use-after-free vulnerability, where released memory is improperly accessed, in
  the WebProtect component to achieve arbitrary code execution inside the
  browser sandbox. T…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
cvssSource: vendor
cwe:
  - CWE-416
vendor: Red Hat
product: Chrome
affected:
  - Chrome >= 156.0.8078.47 < 156.0.8078.47
published: '2026-10-20'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T01:32:32+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-113103.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-113103.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-113103'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-113103'
  - url: >-
      https://chromereleases.googleblog.com/2026/10/stable-channel-update-for-desktop_02018666648.html
  - url: 'https://issues.chromium.org/issues/500474551'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-20T22:55:59.045693Z'
ingestedAt: '2026-10-20T21:19:21.171Z'
epss: 0.00528
epssPercentile: 0.44479
---

## Overview

A flaw was found in chromium-browser. A remote attacker can exploit a use-after-free vulnerability, where released memory is improperly accessed, in the WebProtect component to achieve arbitrary code execution inside the browser sandbox. To exploit this issue, an attacker must trick a user into visiting a specially crafted HTML page. Successful exploitation allows the attacker to execute unauthorized instructions within the restricted sandbox environment.

## Vendor advisories

- **Red Hat VEX** · updated 2026-10-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-113103.json)

**chromium-browser: chromium-browser: arbitrary code execution in WebProtect via crafted HTML page**. Released 2026-10-20, updated 2026-10-21.

Not affected:

- All currently supported Red Hat products

## Remediation

Refer to the advisory for fix availability.