CVE-2026-107448EPSS p3.2%

CVE-2026-107448CVE-2026-107448

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.

Scoring

CVSS 3.4 ()
VectorCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N
EPSS0.14% probability of exploitation · percentile 3.2% · 2026-10-10T12:00:23Z
Last modified2026-10-10
Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.