Magic: The Gathering Arena (Windows/Steam client; 2026.59.30.12801.127931.6 and certain later 2026.60.x builds) passes a server-supplied URL from a home-screen carousel GoToExternalUrl action directly to the Windows shell via Application.OpenURL/ShellExecuteW without validating the URI scheme or domain. A hypothetical attacker able to control the carousel content delivered to clients can cause arbitrary registered URI-scheme handlers to be invoked on client hosts with no user interaction. For example, one might expect that the carousel content only has https: URIs, not ms-calculator: URIs.
History

Sat, 10 Oct 2026 03:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 09 Oct 2026 09:15:00 +0000

Type Values Removed Values Added
First Time appeared Wizards Of The Coast
Wizards Of The Coast magic The Gathering Arena
Vendors & Products Wizards Of The Coast
Wizards Of The Coast magic The Gathering Arena

Thu, 08 Oct 2026 05:45:00 +0000

Type Values Removed Values Added
Title Unvalidated URL Execution Enables Arbitrary URI Scheme Invocation

Thu, 08 Oct 2026 04:15:00 +0000

Type Values Removed Values Added
Description Magic: The Gathering Arena (Windows/Steam client; 2026.59.30.12801.127931.6 and certain later 2026.60.x builds) passes a server-supplied URL from a home-screen carousel GoToExternalUrl action directly to the Windows shell via Application.OpenURL/ShellExecuteW without validating the URI scheme or domain. A hypothetical attacker able to control the carousel content delivered to clients can cause arbitrary registered URI-scheme handlers to be invoked on client hosts with no user interaction. For example, one might expect that the carousel content only has https: URIs, not ms-calculator: URIs.
Weaknesses CWE-99
References
Metrics cvssV3_1

{'score': 3.4, 'vector': 'CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2026-10-08T03:57:54.878Z

Updated: 2026-10-10T02:56:06.772Z

Reserved: 2026-10-08T03:57:54.085Z

Link: CVE-2026-107448

cve-icon Vulnrichment

Updated: 2026-10-10T02:56:00.749Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-08T04:17:19.640

Modified: 2026-10-10T03:17:07.040

Link: CVE-2026-107448

cve-icon Redhat

No data.