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.
Published: 2026-10-08
Score: 3.4 Low
EPSS: n/a
KEV: No
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Thu, 08 Oct 2026 05:45:00 +0000

Type Values Removed Values Added
Title Unvalidated URL Execution Enables Arbitrary URI Scheme Invocation

Thu, 08 Oct 2026 04:15:00 +0000

Type Values Removed Values Added
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.
Weaknesses CWE-99
References
Metrics cvssV3_1

{'score': 3.4, 'vector': 'CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N'}


Subscriptions

No data.

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-10-08T03:57:54.878Z

Reserved: 2026-10-08T03:57:54.085Z

Link: CVE-2026-107448

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-08T04:17:19.640

Modified: 2026-10-08T04:17:19.640

Link: CVE-2026-107448

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-08T05:30:17Z

Weaknesses
  • CWE-99

    Improper Control of Resource Identifiers ('Resource Injection')