{"id":"CVE-2026-107448","published":"2026-10-08T04:17:19.640","lastModified":"2026-10-10T03:17:07.040","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.","cvssScore":3.4,"cvssSeverity":"LOW","cvssVector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N","cwes":["CWE-99"],"vendors":[],"products":[],"references":[{"url":"https://github.com/N0tMilk/vulnerability-research/blob/main/Magic/carousel-shellexecute-mtga.md","tags":[]},{"url":"https://github.com/N0tMilk/vulnerability-research/blob/main/Magic/carousel-shellexecute-mtga.md","tags":[]}],"exploitRefs":[{"url":"https://github.com/N0tMilk/vulnerability-research/blob/main/Magic/carousel-shellexecute-mtga.md","tags":[]},{"url":"https://github.com/N0tMilk/vulnerability-research/blob/main/Magic/carousel-shellexecute-mtga.md","tags":[]}],"hasPoc":true,"ai":null}