CVE-2026-107448

LOW 3.4

CVSS Score

3.4

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-99
Vendor	wizards of the coast
Product	magic: the gathering arena
Published	Oct 8, 2026

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CVSS v3 Breakdown

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

Attack Vector

Adjacent

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

Low

Availability

None

Affected Versions

Wizards of the Coast / Magic: The Gathering Arena

2026.59.30.12801.127931.6

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/N0tMilk/vulnerability-research/blob/main/Magic/carousel-shellexecute-mtga.md