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CVE-2026-106498

Estado: RecibidaAlta (7.7)—

Backstage is an open framework for building developer portals. Prior to 3.5.1, 3.6.2, 3.7.2, 3.8.2 and 3.9.1, the @backstage/plugin-catalog-backend package is affected by improper url validation in catalog entity placeholder resolution. An authenticated Backstage user could craft a catalog entity with placeholder directives that reference resources outside the entity's source repository. Under certain configurations, this could allow access to data not intended to be available to the user. This issue is fixed in versions 3.5.1, 3.6.2, 3.7.2, 3.8.2 and 3.9.1.

CVSS

Probabilidad de explotación (EPSS)

FIRST aún no ha puntuado esta CVE (habitual en CVEs muy recientes o rechazadas).

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, acceso a servicios remotos por usuario autenticado con validación deficiente de URLs. Impacto: acceso a datos no autorizados (T1552.001) y potencial SSRF (T1090.004) mediante resolución de placeholders malformados.

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 ScanningUser TrainingThreat Intelligence ProgramSSL/TLS InspectionRestrict File and Directory PermissionsPrivileged Account Management

Tecnologías afectadas (1)

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

Backstage — Plugin Catalog BackendAI

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-106498",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 7.7,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 4,
        "exploitabilityScore": 3.1
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "backstage",
          "product": "backstage",
          "versions": [
            {
              "status": "affected",
              "version": "< 1.49.6"
            },
            {
              "status": "affected",
              "version": ">= 1.50.0-next.0, < 1.50.5"
            },
            {
              "status": "affected",
              "version": ">= 1.51.0-next.0, < 1.51.3"
            },
            {
              "status": "affected",
              "version": ">= 1.52.0-next.0, < 1.53.2"
            },
            {
              "status": "affected",
              "version": ">= 1.54.0-next.0, < 1.54.6"
            }
          ]
        },
        {
          "vendor": "@backstage",
          "product": "plugin-catalog-backend",
          "versions": [
            {
              "status": "affected",
              "version": "< 3.5.1"
            },
            {
              "status": "affected",
              "version": ">= 3.6.0, < 3.6.2"
            },
            {
              "status": "affected",
              "version": ">= 3.7.0, < 3.7.2"
            },
            {
              "status": "affected",
              "version": ">= 3.8.0, < 3.8.2"
            },
            {
              "status": "affected",
              "version": ">= 3.9.0, < 3.9.1"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-10-06T22:17:04.713",
  "references": [
    {
      "url": "https://github.com/backstage/backstage/commit/0b0f6fc89b4eb4872c76a498abbe1dc65998bb6e",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/backstage/backstage/commit/286bfc1f9cc3608a073b41016be302785be385d1",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/backstage/backstage/commit/61a10f19926aeda7f4a32de48d733e6710584634",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/backstage/backstage/commit/99729e925fd2bd40ba210022351a0ee6318e6197",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/backstage/backstage/commit/e786ac309ed2d775daf2309393c015c43902d6f6",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/backstage/backstage/releases/tag/v1.49.6",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/backstage/backstage/releases/tag/v1.50.5",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/backstage/backstage/releases/tag/v1.51.3",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/backstage/backstage/releases/tag/v1.53.2",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/backstage/backstage/releases/tag/v1.54.6",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/backstage/backstage/security/advisories/GHSA-qgvj-qcf8-xq73",
      "source": "security-advisories@github.com"
    }
  ],
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-863"
        },
        {
          "lang": "en",
          "value": "CWE-918"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Backstage is an open framework for building developer portals. Prior to 3.5.1, 3.6.2, 3.7.2, 3.8.2 and 3.9.1, the @backstage/plugin-catalog-backend package is affected by improper url validation in catalog entity placeholder resolution. An authenticated Backstage user could craft a catalog entity with placeholder directives that reference resources outside the entity's source repository. Under certain configurations, this could allow access to data not intended to be available to the user. This issue is fixed in versions 3.5.1, 3.6.2, 3.7.2, 3.8.2 and 3.9.1."
    }
  ],
  "lastModified": "2026-10-06T22:17:04.713",
  "sourceIdentifier": "security-advisories@github.com"
}