CVE-2026-107448

Status: Awaiting AnalysisLow (3.4)—

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.

CVSS

Version: 3.1
Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N
Base score: 3.4

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.14%
Percentile among all scored CVEs: 3
Score date: 10/14/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

ExploitationT1210 Exploitation of Remote Serviceslateral movement75 %

Servidor remoto controla URL del carrusel sin validar esquema URI (CWE-99: Improper Control of Resource Identifiers); invoca handlers de protocolos registrados (p.ej. ms-calculator:) sin interacción del usuario vía ShellExecuteW, permitiendo ejecución de código mediante WMI/OLE.

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Vulnerability Scanning Threat Intelligence Program Privileged Account Management Network Segmentation Disable or Remove Feature or Program Application Isolation and Sandboxing

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Wizards OF THE Coast — Magic THE Gathering Arena^AI

CWEs

CWE-99

References

Raw JSON (NVD)

Show

{
  "id": "CVE-2026-107448",
  "cveTags": [],
  "metrics": {
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-107448",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-10-10T02:55:43.075662Z"
        }
      }
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    "cvssMetricV31": [
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          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 3.4,
          "attackVector": "ADJACENT_NETWORK",
          "baseSeverity": "LOW",
          "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 1.6
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "Wizards of the Coast",
          "product": "Magic: The Gathering Arena",
          "versions": [
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              "status": "affected",
              "version": "2026.59.30.12801.127931.6",
              "versionType": "custom"
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          "platforms": [
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  "published": "2026-10-08T04:17:19.640",
  "references": [
    {
      "url": "https://github.com/N0tMilk/vulnerability-research/blob/main/Magic/carousel-shellexecute-mtga.md",
      "source": "cve@mitre.org"
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      "value": "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."
    }
  ],
  "lastModified": "2026-10-10T03:17:07.040",
  "sourceIdentifier": "cve@mitre.org"
}