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CVE-2026-14765— Epic Games Unreal Engine Insecure Default URL Scheme Allowance in LaunchURL

Quick assessment

Affected
Epic Games Unreal Engine
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Epic Games 的 Unreal Engine 版本最高至 5.8.0（含）中，LaunchURL Blueprint 节点（对应函数 UKismetSystemLibrary::LaunchURL）存在不安全的默认配置。该节点的 URL 方案过滤器（FURLRequestFilter）默认为空，从而允许使用所有 URL 方案。在 Windows 平台上，这会导致系统调用 ShellExecuteW() 函数并传入 “open” 动作，因此若提供 file:/// 格式的 URI，将导致引用文件被执行。任何加

CVSS 7.7 · High

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2026-14765

Vulnerability Information
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Vulnerability Title
Epic Games Unreal Engine Insecure Default URL Scheme Allowance in LaunchURL
Source: CVE Program / CVE List V5
Vulnerability 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).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不安全的默认资源初始化
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Epic Games Unreal Engine 0 ~ 5.8.0 -

II. Public POCs for CVE-2026-14765

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III. Intelligence Information for CVE-2026-14765

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Other References for CVE-2026-14765 (2)

IV. Related Vulnerabilities

Same vendor: Epic Games
Same weakness: CWE-1188

V. Comments for CVE-2026-14765

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