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CVE-2026-48920

Estado: AnalizadaAlta (8.8)—

Jenkins Email Extension Plugin 1933.v45cec755423f and earlier allows inlining images as `base64` in email content by setting the `data-inline` attribute, without restrictions on the image URLs that can be inlined, allowing attackers able to control the email content to specify `file:` URLs for images to read arbitrary files from the Jenkins controller filesystem.

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Acceso remoto a servicio Jenkins con PR:L permitiendo lectura de archivos arbitrarios vía atributo data-inline; CWE-73 (acceso a recurso externo sin validación).

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Privileged Account ManagementUpdate SoftwareActive Directory ConfigurationVulnerability ScanningUser TrainingThreat Intelligence Program

Tecnologías afectadas (1)

Jenkins — Email Extension

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2026-48920",
  "cveTags": [],
  "metrics": {
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        "ssvcData": {
          "id": "CVE-2026-48920",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-05-27T15:43:03.856495Z"
        }
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          "version": "3.1",
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          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "jenkinsci-cert@googlegroups.com",
      "affectedData": [
        {
          "vendor": "Jenkins Project",
          "product": "Jenkins Email Extension Plugin",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "versionType": "maven",
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            }
          ],
          "defaultStatus": "unaffected"
        }
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  ],
  "published": "2026-05-27T15:16:31.647",
  "references": [
    {
      "url": "https://www.jenkins.io/security/advisory/2026-05-27/#SECURITY-3705",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "jenkinsci-cert@googlegroups.com"
    }
  ],
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    }
  ],
  "lastModified": "2026-06-17T10:55:23.903",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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}