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.
Metrics
Affected Vendors & Products
References
History
Sat, 10 Oct 2026 03:30:00 +0000
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| Metrics |
ssvc
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Fri, 09 Oct 2026 09:15:00 +0000
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| First Time appeared |
Wizards Of The Coast
Wizards Of The Coast magic The Gathering Arena |
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| Vendors & Products |
Wizards Of The Coast
Wizards Of The Coast magic The Gathering Arena |
Thu, 08 Oct 2026 05:45:00 +0000
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| Title | Unvalidated URL Execution Enables Arbitrary URI Scheme Invocation |
Thu, 08 Oct 2026 04:15:00 +0000
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| 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 |
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| Metrics |
cvssV3_1
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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
Updated: 2026-10-10T02:56:00.749Z
Status : Awaiting Analysis
Published: 2026-10-08T04:17:19.640
Modified: 2026-10-10T03:17:07.040
Link: CVE-2026-107448
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