CVE-2026-86600 PUBLISHED

Workload identity attestation generated before login host validation in Snowflake drivers

Assigner: SNOWFLAKE
Reserved: 08.09.2026 Published: 08.09.2026 Updated: 08.09.2026

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.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
CVSS Score: 8.2

Product Status

Vendor Snowflake
Product Snowflake Connector for Python
Versions Default: unaffected
  • affected from 3.14.1 to 4.7.3 (excl.)
Vendor Snowflake
Product Snowflake Go Driver
Versions Default: unaffected
  • affected from 1.15.0 to 2.2.0 (excl.)
Vendor Snowflake
Product Snowflake JDBC Driver
Versions Default: unaffected
  • affected from 3.24.0 to 4.3.4 (excl.)
Vendor Snowflake
Product Snowflake Node.js Driver
Versions Default: unaffected
  • affected from 2.1.1 to 3.3.0 (excl.)
Vendor Snowflake
Product Snowflake Connector for .NET
Versions Default: unaffected
  • affected from 4.7.0 to 6.1.0 (excl.)
Vendor Snowflake
Product Snowflake ODBC Driver
Versions Default: unaffected
  • affected from 3.9.0 to 3.20.0 (excl.)
Vendor Snowflake
Product Snowflake PHP PDO Driver
Versions Default: unaffected
  • affected from 3.6.0 to 4.2.0 (excl.)
Vendor Snowflake
Product Snowflake Libsnowflakeclient
Versions Default: unaffected
  • affected from 2.2.0 to 2.10.0 (excl.)

References

Problem Types

  • Insufficiently Protected Credentials CWE
  • Unintended Proxy or Intermediary ('Confused Deputy') CWE