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CVE-2026-27807

Estado: AnalizadaMedia (4.9)—

MarkUs is a web application for the submission and grading of student assignments. Prior to version 2.9.4, MarkUs allows course instructors to upload YAML files to create/update various entities (e.g., assignment settings). These YAML files are parsed with aliases enabled. This issue has been patched in version 2.9.4.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Markusproject — Markus

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-27807",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-27807",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-03-06T15:50:49.801664Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 4.9,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.2
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "MarkUsProject",
          "product": "Markus",
          "versions": [
            {
              "status": "affected",
              "version": "< 2.9.4"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-03-06T04:16:07.810",
  "references": [
    {
      "url": "https://github.com/MarkUsProject/Markus/releases/tag/v2.9.4",
      "tags": [
        "Product",
        "Release Notes"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/MarkUsProject/Markus/security/advisories/GHSA-m9rx-85mx-q9h6",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-776"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "MarkUs is a web application for the submission and grading of student assignments. Prior to version 2.9.4, MarkUs allows course instructors to upload YAML files to create/update various entities (e.g., assignment settings). These YAML files are parsed with aliases enabled. This issue has been patched in version 2.9.4."
    },
    {
      "lang": "es",
      "value": "MarkUs es una aplicación web para la entrega y calificación de tareas de estudiantes. Antes de la versión 2.9.4, MarkUs permite a los instructores del curso cargar archivos YAML para crear/actualizar varias entidades (por ejemplo, configuraciones de tareas). Estos archivos YAML se analizan con alias habilitados. Este problema ha sido parcheado en la versión 2.9.4."
    }
  ],
  "lastModified": "2026-06-17T10:27:43.023",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:markusproject:markus:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "68B46CED-C806-4F2A-B1C6-727EE540E7A2",
              "versionEndExcluding": "2.9.4"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security-advisories@github.com"
}