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CVE-2026-1699

Estado: AnalizadaAlta (8.8)—

In the Eclipse Theia Website repository, the GitHub Actions workflow .github/workflows/preview.yml used pull_request_target trigger while checking out and executing untrusted pull request code. This allowed any GitHub user to execute arbitrary code in the repository's CI environment with access to repository secrets and a GITHUB_TOKEN with extensive write permissions (contents:write, packages:write, pages:write, actions:write). An attacker could exfiltrate secrets, publish malicious packages to the eclipse-theia organization, modify the official Theia website, and push malicious code to the repository.

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 con privilegios (PR:L) a CI/CD. Ejecución de código arbitrario en ambiente CI con acceso a secretos (exfiltración) y modificación de repositorio (integridad).

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 ManagementNetwork SegmentationDisable or Remove Feature or ProgramVulnerability ScanningUser Account ManagementThreat Intelligence Program

Tecnologías afectadas (1)

Eclipse — Theia Website

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-1699",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-1699",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-02-02T19:26:22.478406Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "emo@eclipse.org",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 10,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 6,
        "exploitabilityScore": 3.9
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 8.8,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "emo@eclipse.org",
      "affectedData": [
        {
          "repo": "https://github.com/eclipse-theia/theia-website",
          "vendor": "Eclipse Foundation",
          "product": "Eclipse Theia - Website",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "2fb0cc4bfc372cfaef79feb4eebb6563778b2560",
              "versionType": "git"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2026-01-30T10:15:56.617",
  "references": [
    {
      "url": "https://gitlab.eclipse.org/security/vulnerability-reports/-/issues/332",
      "tags": [
        "Exploit",
        "Issue Tracking",
        "Vendor Advisory"
      ],
      "source": "emo@eclipse.org"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "emo@eclipse.org",
      "description": [
        {
          "lang": "en",
          "value": "CWE-829"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Eclipse Theia Website repository, the GitHub Actions workflow .github/workflows/preview.yml used pull_request_target trigger while checking out and executing untrusted pull request code. This allowed any GitHub user to execute arbitrary code in the repository's CI environment with access to repository secrets and a GITHUB_TOKEN with extensive write permissions (contents:write, packages:write, pages:write, actions:write). An attacker could exfiltrate secrets, publish malicious packages to the eclipse-theia organization, modify the official Theia website, and push malicious code to the repository."
    },
    {
      "lang": "es",
      "value": "En el repositorio de Eclipse Theia Website, el flujo de trabajo de GitHub Actions .github/workflows/preview.yml utilizó el disparador pull_request_target mientras extraía y ejecutaba código de solicitud de extracción no confiable. Esto permitió a cualquier usuario de GitHub ejecutar código arbitrario en el entorno de CI del repositorio con acceso a secretos del repositorio y un GITHUB_TOKEN con amplios permisos de escritura (contents:write, packages:write, pages:write, actions:write). Un atacante podría exfiltrar secretos, publicar paquetes maliciosos en la organización eclipse-theia, modificar el sitio web oficial de Theia y enviar código malicioso al repositorio."
    }
  ],
  "lastModified": "2026-06-17T10:16:21.190",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:eclipse:theia_website:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "9712F17D-952F-44AE-931E-8C2491E4C1C7",
              "versionEndExcluding": "2026-01-22"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "emo@eclipse.org"
}