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    4 vulnerabilities found for Snowflake Connector for .NET by Snowflake

    CVE-2026-114456 (GCVE-0-2026-114456)

    Vulnerability from nvd – Published: 2026-11-04 11:22 – Updated: 2026-11-04 20:00
    VLAI
    Title
    Missing origin validation for the externalbrowser authenticator callback in multiple Snowflake client drivers
    Summary
    Multiple Snowflake client drivers implementing the `authenticator=externalbrowser` single sign-on flow could have allowed an attacker to interfere with a user's login attempt through weaknesses in the local loopback callback listener used to receive the identity provider's response. The listener reflected an arbitrary request's Origin header into its CORS response headers and accepted the first token-bearing request it received during the login window without verifying a CSRF state value bound to that specific login attempt. An attacker able to reach the listener during an active login might have leveraged this to submit a forged callback response, causing the authentication attempt to fail. The fix is available in Snowflake Connector for Python 4.8.0, Snowflake Go Driver v2.3.0, Snowflake JDBC Driver 4.4.0 (including the snowflake-jdbc-fips and snowflake-jdbc-thin artifacts), Snowflake Node.js Driver 3.4.0, Snowflake Connector for .NET 6.3.0, Snowflake ODBC Driver 4.0.0, Snowflake PHP PDO Driver 4.3.0, and libsnowflakeclient 2.11.1. Go v1 users must migrate to the latest major version of the module. Users must manually upgrade.
    Severity
    6.5 (Medium)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-11-04 18:20 UTC
    CWE
    • CWE-346 - Origin Validation Error
    Assigner
    SNOWFLAKE CNA
    CNA scorecard C 65/100 over 21 records in the last 180 days details
    References
    Impacted products
    Show details on NVD website
    To clipboard 

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              "version": "2.1.0",
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      ],
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          "value": "Multiple Snowflake client drivers implementing the `authenticator=externalbrowser` single sign-on flow could have allowed an attacker to interfere with a user\u0027s login attempt through weaknesses in the local loopback callback listener used to receive the identity provider\u0027s response. The listener reflected an arbitrary request\u0027s Origin header into its CORS response headers and accepted the first token-bearing request it received during the login window without verifying a CSRF state value bound to that specific login attempt. An attacker able to reach the listener during an active login might have leveraged this to submit a forged callback response, causing the authentication attempt to fail. The fix is available in Snowflake Connector for Python 4.8.0, Snowflake Go Driver v2.3.0, Snowflake JDBC Driver 4.4.0 (including the snowflake-jdbc-fips and snowflake-jdbc-thin artifacts), Snowflake Node.js Driver 3.4.0, Snowflake Connector for .NET 6.3.0, Snowflake ODBC Driver 4.0.0, Snowflake PHP PDO Driver 4.3.0, and libsnowflakeclient 2.11.1. Go v1 users must migrate to the latest major version of the module. Users must manually upgrade."
        }
      ],
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    CVE-2026-86600 (GCVE-0-2026-86600)

    Vulnerability from nvd – Published: 2026-09-08 15:48 – Updated: 2026-09-10 15:23
    VLAI
    Title
    Workload identity attestation generated before login host validation in Snowflake drivers
    Summary
    In affected Snowflake drivers, WORKLOAD_IDENTITY authentication requests a cloud workload-identity token and attaches it to the login request without verifying that the configured host is a Snowflake endpoint. An attacker who can modify the connection configuration can cause the driver to mint a fresh attestation and send it to a host they control. The captured token can be replayed to Snowflake for its remaining lifetime in accounts where that workload identity is already registered. On Azure, the token audience is also taken from connection configuration. Combined with an attacker-controlled host, the driver can request a Managed Identity access token scoped to a non-Snowflake Azure resource and deliver it to the attacker. That path is the only case in which impact extends beyond Snowflake; it is bounded by the token lifetime and the managed identity’s permissions. Successful exploitation requires WORKLOAD_IDENTITY authentication on a workload that already has an ambient cloud identity. Patched driver versions restrict this authenticator to recognized Snowflake hosts. Users must manually upgrade.
    Severity
    8.2 (High)
    CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-08 18:03 UTC
    CWE
    • CWE-522 - Insufficiently Protected Credentials
    • CWE-441 - Unintended Proxy or Intermediary ('Confused Deputy')
    Assigner
    SNOWFLAKE CNA
    CNA scorecard C 65/100 over 21 records in the last 180 days details
    References
    Impacted products
    Show details on NVD website
    To clipboard 

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        }
      ],
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            },
            {
              "cweId": "CWE-441",
              "description": "Unintended Proxy or Intermediary (\u0027Confused Deputy\u0027)",
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              "type": "CWE"
            }
          ]
        }
      ],
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          "name": "Snowflake Go Driver Release Notes",
          "url": "https://docs.snowflake.com/en/release-notes/clients-drivers/golang-2026#version-220-sep-03-2026"
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          "name": "Snowflake Node.js Driver Release Notes",
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          "name": "Snowflake Connector for .NET Release Notes",
          "url": "https://docs.snowflake.com/en/release-notes/clients-drivers/dotnet-2026#version-610-september-3-2026"
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    CVE-2026-114456 (GCVE-0-2026-114456)

    Vulnerability from cvelistv5 – Published: 2026-11-04 11:22 – Updated: 2026-11-04 20:00
    VLAI
    Title
    Missing origin validation for the externalbrowser authenticator callback in multiple Snowflake client drivers
    Summary
    Multiple Snowflake client drivers implementing the `authenticator=externalbrowser` single sign-on flow could have allowed an attacker to interfere with a user's login attempt through weaknesses in the local loopback callback listener used to receive the identity provider's response. The listener reflected an arbitrary request's Origin header into its CORS response headers and accepted the first token-bearing request it received during the login window without verifying a CSRF state value bound to that specific login attempt. An attacker able to reach the listener during an active login might have leveraged this to submit a forged callback response, causing the authentication attempt to fail. The fix is available in Snowflake Connector for Python 4.8.0, Snowflake Go Driver v2.3.0, Snowflake JDBC Driver 4.4.0 (including the snowflake-jdbc-fips and snowflake-jdbc-thin artifacts), Snowflake Node.js Driver 3.4.0, Snowflake Connector for .NET 6.3.0, Snowflake ODBC Driver 4.0.0, Snowflake PHP PDO Driver 4.3.0, and libsnowflakeclient 2.11.1. Go v1 users must migrate to the latest major version of the module. Users must manually upgrade.
    Severity
    6.5 (Medium)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-11-04 18:20 UTC
    CWE
    • CWE-346 - Origin Validation Error
    Assigner
    SNOWFLAKE CNA
    CNA scorecard C 65/100 over 21 records in the last 180 days details
    References
    Impacted products
    Show details on NVD website
    To clipboard 

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    CVE-2026-86600 (GCVE-0-2026-86600)

    Vulnerability from cvelistv5 – Published: 2026-09-08 15:48 – Updated: 2026-09-10 15:23
    VLAI
    Title
    Workload identity attestation generated before login host validation in Snowflake drivers
    Summary
    In affected Snowflake drivers, WORKLOAD_IDENTITY authentication requests a cloud workload-identity token and attaches it to the login request without verifying that the configured host is a Snowflake endpoint. An attacker who can modify the connection configuration can cause the driver to mint a fresh attestation and send it to a host they control. The captured token can be replayed to Snowflake for its remaining lifetime in accounts where that workload identity is already registered. On Azure, the token audience is also taken from connection configuration. Combined with an attacker-controlled host, the driver can request a Managed Identity access token scoped to a non-Snowflake Azure resource and deliver it to the attacker. That path is the only case in which impact extends beyond Snowflake; it is bounded by the token lifetime and the managed identity’s permissions. Successful exploitation requires WORKLOAD_IDENTITY authentication on a workload that already has an ambient cloud identity. Patched driver versions restrict this authenticator to recognized Snowflake hosts. Users must manually upgrade.
    Severity
    8.2 (High)
    CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-08 18:03 UTC
    CWE
    • CWE-522 - Insufficiently Protected Credentials
    • CWE-441 - Unintended Proxy or Intermediary ('Confused Deputy')
    Assigner
    SNOWFLAKE CNA
    CNA scorecard C 65/100 over 21 records in the last 180 days details
    References
    Impacted products
    Show details on NVD website
    To clipboard 

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        },
        {
          "name": "Snowflake JDBC Driver Release Notes",
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        },
        {
          "name": "Snowflake Node.js Driver Release Notes",
          "url": "https://docs.snowflake.com/en/release-notes/clients-drivers/nodejs-2026#version-330-september-3-2026"
        },
        {
          "name": "Snowflake Connector for .NET Release Notes",
          "url": "https://docs.snowflake.com/en/release-notes/clients-drivers/dotnet-2026#version-610-september-3-2026"
        },
        {
          "name": "Snowflake ODBC Driver Release Notes",
          "url": "https://docs.snowflake.com/en/release-notes/clients-drivers/odbc-2026#version-3200-sep-3-2026"
        },
        {
          "name": "Snowflake PHP PDO Driver Release Notes",
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        },
        {
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          "url": "https://github.com/snowflakedb/libsnowflakeclient/releases/tag/v2.10.0"
        }
      ],
      "title": "Workload identity attestation generated before login host validation in Snowflake drivers",
      "x_generator": {
        "engine": "cvelib 1.8.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "412d305a-227d-44f9-a262-a31ba44f2aea",
    "assignerShortName": "SNOWFLAKE",
    "cveId": "CVE-2026-86600",
    "datePublished": "2026-09-08T15:48:45.858Z",
    "dateReserved": "2026-09-08T08:32:19.278Z",
    "dateUpdated": "2026-09-10T15:23:04.821Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}