{"schema":"threatline.record/2","record":{"id":"CVE-2026-107448","aliases":[],"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","details":"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.","categories":["Unclassified"],"product":"Magic: The Gathering Arena","vendor":"Wizards of the Coast","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-107448","source_modified_at":"2026-10-10T02:56:06.772Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"Magic: The Gathering Arena","vendor":"Wizards of the Coast","versions":[{"status":"affected","version":"2026.59.30.12801.127931.6","versionType":"custom"}],"defaultStatus":"unknown"}],"fixed_versions":[],"cvss":3.4,"severity":"Low","kev":{"listed":false},"epss":{"probability":0.00144,"percentile":0.03385,"score_date":"2026-10-23"},"published_at":"2026-10-08T03:57:54.878Z","modified_at":"2026-10-10T02:56:06.772Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-107448","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-10T02:56:06.772Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-107448","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/N0tMilk/vulnerability-research/blob/main/Magic/carousel-shellexecute-mtga.md","tags":["exploit"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"poc","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-10T02:55:43.075662Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-10T02:56:06.772Z","content_hash":"b0339ff58bca9f75c9f42c9ee69873678696566de3af06a0e7594077f08e5a3a"}}