Epic Games Unreal Engine versions up to and including 5.8.0 ship with an insecure default configuration for the LaunchURL Blueprint node (UKismetSystemLibrary::LaunchURL). The URL scheme filter (FURLRequestFilter) is empty by default, which permits all URL schemes. On Windows, this results in a call to ShellExecuteW() with the open verb, so a supplied file:/// URI causes the referenced file to be executed. Any Unreal Engine game that loads user-generated content containing Blueprints is vulnerable to command execution via a malicious local file or a remote file on a WebDAV share. This is an instance of CWE-1188 (Initialization of a Resource with an Insecure Default).
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Fixes

Solution

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Workaround

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History

Sun, 18 Oct 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 14 Oct 2026 02:45:00 +0000

Type Values Removed Values Added
Description Epic Games Unreal Engine versions up to and including 5.8.0 ship with an insecure default configuration for the LaunchURL Blueprint node (UKismetSystemLibrary::LaunchURL). The URL scheme filter (FURLRequestFilter) is empty by default, which permits all URL schemes. On Windows, this results in a call to ShellExecuteW() with the open verb, so a supplied file:/// URI causes the referenced file to be executed. Any Unreal Engine game that loads user-generated content containing Blueprints is vulnerable to command execution via a malicious local file or a remote file on a WebDAV share. This is an instance of CWE-1188 (Initialization of a Resource with an Insecure Default).
Title Epic Games Unreal Engine Insecure Default URL Scheme Allowance in LaunchURL
Weaknesses CWE-1188
References
Metrics cvssV3_1

{'score': 7.7, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: AHA

Published:

Updated: 2026-10-18T13:54:09.144Z

Reserved: 2026-07-04T17:45:14.357Z

Link: CVE-2026-14765

cve-icon Vulnrichment

Updated: 2026-10-18T13:47:45.696Z

cve-icon NVD

Status : Deferred

Published: 2026-10-14T03:17:21.927

Modified: 2026-10-18T14:16:54.843

Link: CVE-2026-14765

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-16T02:00:16Z

Weaknesses