{"id":"CVE-2026-107448","title":"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…","summary":"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…","severity":"low","cvss":3.4,"cvssVector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N","cwe":["CWE-99"],"vendor":"Wizards of the Coast","product":"Magic: The Gathering Arena","affected":["magic_the_gathering_arena 2026.59.30.12801.127931.6"],"published":"2026-10-08","updated":"2026-10-08","sourceUpdated":"2026-10-08T04:17:19.640","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-107448","references":[{"url":"https://github.com/N0tMilk/vulnerability-research/blob/main/Magic/carousel-shellexecute-mtga.md","label":"cve@mitre.org"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-10-08T04:04:32.117Z","slug":"CVE-2026-107448","body":"## Overview\n\nMagic: 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":19,"depthScoreParts":{"impact":18.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}