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CVE-2026-59788

Status: Awaiting AnalysisMedium (5.7)—

The email media type OAuth form passes the Authorization endpoint value to window.open() without validating the URL scheme, so a javascript: URL is executed in the browser. This means a crafted media type configuration, deliverable as an import file, runs arbitrary JavaScript as the Super Admin who grants consent.

CVSS

Exploitation probability (EPSS)

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.

XSS vía javascript: en window.open() sin validación de esquema URL (CWE-79). Ejecuta JS arbitrario en navegador con permisos de Super Admin que autoriza el archivo importado.

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

Restrict Web-Based ContentDisable or Remove Feature or ProgramUser TrainingUser Account ManagementRestrict File and Directory PermissionsPrivileged Account Management

CWEs

References

Raw JSON (NVD)

Show
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  "id": "CVE-2026-59788",
  "cveTags": [],
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        "ssvcData": {
          "id": "CVE-2026-59788",
          "role": "CISA Coordinator",
          "options": [
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              "exploitation": "none"
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              "automatable": "no"
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          "version": "2.0.3",
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          "exploitMaturity": "NOT_DEFINED",
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  "published": "2026-10-05T11:17:00.113",
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    }
  ],
  "lastModified": "2026-10-06T15:27:05.657",
  "sourceIdentifier": "security@zabbix.com"
}