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CVE-2026-47358

Status: AnalyzedCritical (9.2)—

Terrascan v1.18.3 and prior are vulnerable to Server-Side Request Forgery (SSRF) via external URL resolution in uploaded IaC templates when running in server mode. When Terrascan parses uploaded ARM templates or CloudFormation templates, it resolves external URLs referenced within those templates via hashicorp/go-getter with all default detectors enabled, including FileDetector.

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An unauthenticated remote attacker can upload an ARM template containing a templateLink.uri or parametersLink.uri field, or a CloudFormation template containing an AWS::CloudFormation::Stack TemplateURL field, pointing to an attacker-controlled URL. Terrascan will fetch the attacker-controlled URL server-side. Unlike SSRF via the remote scan endpoint, file:// URLs are directly usable without requiring an X-Terraform-Get redirect, enabling local file read. This affects deployments running terrascan in server mode (terrascan server), which binds to 0.0.0.0 with no authentication. Note: Terrascan was archived in August 2023 and no patch will be released.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

Tenable — Terrascan

CWEs

References

Raw JSON (NVD)

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      "value": "Terrascan v1.18.3 and prior are vulnerable to Server-Side Request Forgery (SSRF) via external URL resolution in uploaded IaC templates when running in server mode. When Terrascan parses uploaded ARM templates or CloudFormation templates, it resolves external URLs referenced within those templates via hashicorp/go-getter with all default detectors enabled, including FileDetector. An unauthenticated remote attacker can upload an ARM template containing a templateLink.uri or parametersLink.uri field, or a CloudFormation template containing an AWS::CloudFormation::Stack TemplateURL field, pointing to an attacker-controlled URL. Terrascan will fetch the attacker-controlled URL server-side. Unlike SSRF via the remote scan endpoint, file:// URLs are directly usable without requiring an X-Terraform-Get redirect, enabling local file read. This affects deployments running terrascan in server mode (terrascan server), which binds to 0.0.0.0 with no authentication. Note: Terrascan was archived in August 2023 and no patch will be released."
    },
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      "lang": "es",
      "value": "Terrascan v1.18.3 y anteriores son vulnerables a la Falsificación de Petición del Lado del Servidor (SSRF) a través de la resolución de URL externas en plantillas IaC cargadas cuando se ejecuta en modo servidor. Cuando Terrascan analiza plantillas ARM o plantillas CloudFormation cargadas, resuelve URL externas referenciadas dentro de esas plantillas a través de hashicorp/go-getter con todos los detectores predeterminados habilitados, incluyendo FileDetector. Un atacante remoto no autenticado puede cargar una plantilla ARM que contenga un campo templateLink.uri o parametersLink.uri, o una plantilla CloudFormation que contenga un campo AWS::CloudFormation::Stack TemplateURL, apuntando a una URL controlada por el atacante. Terrascan recuperará la URL controlada por el atacante del lado del servidor. A diferencia de la SSRF a través del endpoint de escaneo remoto, las URL file:// son directamente utilizables sin requerir una redirección X-Terraform-Get, lo que permite la lectura de archivos locales. Esto afecta a las implementaciones que ejecutan terrascan en modo servidor (terrascan server), que se enlaza a 0.0.0.0 sin autenticación. Nota: Terrascan fue archivado en agosto de 2023 y no se lanzará ningún parche."
    }
  ],
  "lastModified": "2026-07-24T12:10:00.210",
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