Vulnerability · Published Oct 8, 2026 · Assigned by mitre
CVE-2026-107448
Low 3.4
In plain English
A low-severity security flaw in Magic: The Gathering Arena from Wizards of the Coast. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities).
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Wizards of the Coast | Magic: The Gathering Arena | 2026.59.30.12801.127931.6 |
Weakness: CWE-99 · Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N