Epic Games Unreal Engine Insecure Default URL Scheme Allowance in LaunchURL

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-14765
StatePUBLISHED
AssignerAHA
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-14 03:17:21 UTC
Updated2026-10-18 14:16:54 UTC
DescriptionEpic 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).

Risk And Classification

Primary CVSS: v3.1 7.7 HIGH from [email protected]

CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

Problem Types: CWE-1188 | CWE-1188 CWE-1188 Initialization of a Resource with an Insecure Default

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.7HIGHCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
3.1CNACVSS7.7HIGHCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Epic Games Unreal Engine affected 5.8.0 semver Not specified

References

ReferenceSourceLinkTags
khaelkugler.com/blogs/meccha_chameleon.html [email protected] khaelkugler.com
takeonme.org/gcves/GCVE-1337-2026-0000000000000000000000000000000000000000... [email protected] takeonme.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Khael Kugler (en)

CNA: todb of AHA! (en)

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