CVE-2026-107448

State: Published
Severity: 3.4 Low
Published: Oct 8, 2026
Updated: Oct 10, 2026
Reserved: Oct 8, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	3.4 Low	CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N	mitre

Weaknesses

CWE-99 Improper Control of Resource Identifiers ('Resource Injection')

Affected Products

Product	Versions
Magic: The Gathering ArenaWizards of the Coast	2026.59.30.12801.127931.6Affected

References

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

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