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CVE-2026-34603

Estado: AnalizadaAlta (8.3)—

Tina is a headless content management system. Prior to version 2.2.2, @tinacms/cli recently added lexical path-traversal checks to the dev media routes, but the implementation still validates only the path string and does not resolve symlink or junction targets. If a link already exists under the media root, Tina accepts a path like pivot/written-from-media.txt as "inside" the media directory and then performs real filesystem operations through that link target. This allows out-of-root media listing and write access, and the same root cause also affects delete. This issue has been patched in version 2.2.2.

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.

AV:N/PR:L sin UI permite explotar servicio remoto con privilegios de usuario. Path-traversal no resuelto permite lectura y escritura de archivos fuera del directorio permitido en un servidor de medios CMS.

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

Vulnerability ScanningThreat Intelligence ProgramRestrict File and Directory PermissionsPrivileged Account ManagementRemote Data StorageNetwork Segmentation

Tecnologías afectadas (1)

SSW — Tinacms/cli

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-34603",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-34603",
          "role": "CISA Coordinator",
          "options": [
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              "exploitation": "poc"
            },
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              "automatable": "no"
            },
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            }
          ],
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          "timestamp": "2026-04-01T17:52:31.840761Z"
        }
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      "url": "https://github.com/tinacms/tinacms/security/advisories/GHSA-g87c-r2jp-293w",
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      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
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  "weaknesses": [
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      "description": [
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          "value": "CWE-22"
        },
        {
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          "value": "CWE-59"
        }
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    }
  ],
  "descriptions": [
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      "lang": "en",
      "value": "Tina is a headless content management system. Prior to version 2.2.2, @tinacms/cli recently added lexical path-traversal checks to the dev media routes, but the implementation still validates only the path string and does not resolve symlink or junction targets. If a link already exists under the media root, Tina accepts a path like pivot/written-from-media.txt as \"inside\" the media directory and then performs real filesystem operations through that link target. This allows out-of-root media listing and write access, and the same root cause also affects delete. This issue has been patched in version 2.2.2."
    }
  ],
  "lastModified": "2026-06-17T10:39:18.427",
  "configurations": [
    {
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        {
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          "cpeMatch": [
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}