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CVE-2026-43986

Estado: AplazadaCrítica (9.9)—

Tautulli is a Python based monitoring and tracking tool for Plex Media Server. Versions prior to 2.17.1 expose a public `/image/<hash>` route that resolves attacker-controlled entries from `image_hash_lookup` and replays them through the same server-side image fetch logic used by authenticated image proxying. A low-privilege guest user can seed a malicious external image URL into this lookup table and then trigger server-side fetches through a fully unauthenticated endpoint. This turns an authenticated SSRF primitive into a persistent unauthenticated SSRF gadget. Once the malicious hash entry exists, any external user can request `/image/<hash>.png` and cause the PMS or Tautulli host to fetch an arbitrary attacker-chosen URL. Version 2.17.1 patches the issue.

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 autenticación básica (PR:L) a servicio de red que habilita SSRF persistente mediante endpoint público no autenticado; permite proxying de tráfico y acceso a datos internos del servidor.

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 ProgramSSL/TLS InspectionPrivileged Account ManagementNetwork SegmentationNetwork Intrusion Prevention

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Tautulli — TautulliAI

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-43986",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-43986",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-06-04T17:28:57.623297Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 9.9,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "LOW",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 6,
        "exploitabilityScore": 3.1
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "Tautulli",
          "product": "Tautulli",
          "versions": [
            {
              "status": "affected",
              "version": "< 2.17.1"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-06-04T16:16:38.290",
  "references": [
    {
      "url": "https://github.com/Tautulli/Tautulli/releases/tag/v2.17.1",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/Tautulli/Tautulli/security/advisories/GHSA-m6j6-rc2c-8vpm",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/Tautulli/Tautulli/security/advisories/GHSA-m6j6-rc2c-8vpm",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-918"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Tautulli is a Python based monitoring and tracking tool for Plex Media Server. Versions prior to 2.17.1 expose a public `/image/<hash>` route that resolves attacker-controlled entries from `image_hash_lookup` and replays them through the same server-side image fetch logic used by authenticated image proxying. A low-privilege guest user can seed a malicious external image URL into this lookup table and then trigger server-side fetches through a fully unauthenticated endpoint. This turns an authenticated SSRF primitive into a persistent unauthenticated SSRF gadget. Once the malicious hash entry exists, any external user can request `/image/<hash>.png` and cause the PMS or Tautulli host to fetch an arbitrary attacker-chosen URL. Version 2.17.1 patches the issue."
    },
    {
      "lang": "es",
      "value": "Tautulli es una herramienta de monitoreo y seguimiento basada en Python para Plex Media Server. Las versiones anteriores a la 2.17.1 exponen una ruta pública '/image/ hash ' que resuelve entradas controladas por el atacante de image_hash_lookup y las reproduce a través de la misma lógica de obtención de imágenes del lado del servidor utilizada por el proxying de imágenes autenticado. Un usuario invitado de bajo privilegio puede insertar una URL de imagen externa maliciosa en esta tabla de búsqueda y luego activar obtenciones del lado del servidor a través de un endpoint completamente no autenticado. Esto convierte una primitiva SSRF autenticada en un gadget SSRF no autenticado persistente. Una vez que existe la entrada de hash maliciosa, cualquier usuario externo puede solicitar '/image/ hash .png' y hacer que el host de PMS o Tautulli obtenga una URL arbitraria elegida por el atacante. La versión 2.17.1 corrige el problema."
    }
  ],
  "lastModified": "2026-07-22T20:10:00.127",
  "sourceIdentifier": "security-advisories@github.com"
}