Workload identity attestation generated before login host validation in Snowflake drivers

Description

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.

Scores

EPSS (exploitation in 30 days)

0.51% · top 56% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: total

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.2.

Weakness

• CWE-522: Insufficiently Protected Credentials (opens in a new tab)All about CWE-522 and its CVEs
• CWE-441: Unintended Proxy or Intermediary ('Confused Deputy') (opens in a new tab)All about CWE-441 and its CVEs

Affected products

• Snowflake · Snowflake Connector for Python

  • affected 3.14.1 – < 4.7.3

• Snowflake · Snowflake Go Driver

  • affected 1.15.0 – ≤ 1.19.1

• Snowflake · Snowflake Go Driver

  • affected 2.0.0 – < 2.2.0

• Snowflake · Snowflake JDBC Driver

  • affected 3.24.0 – < 4.3.4

• Snowflake · Snowflake JDBC Driver (FIPS)

  • affected 3.24.0 – < 4.3.4

• Snowflake · Snowflake JDBC Driver (Thin)

  • affected 3.24.0 – < 4.3.4

• Snowflake · Snowflake Node.js Driver

  • affected 2.1.1 – < 3.3.0

• Snowflake · Snowflake Connector for .NET

  • affected 4.7.0 – < 6.1.0

• Snowflake · Snowflake ODBC Driver

  • affected 3.9.0 – < 3.20.0

• Snowflake · Snowflake PHP PDO Driver

  • affected 3.6.0 – < 4.2.0

• Snowflake · Snowflake Libsnowflakeclient

  • affected 2.2.0 – < 2.10.0

References (8)

• Snowflake Connector for Python Release Notes (opens in a new tab)
• Snowflake Go Driver Release Notes (opens in a new tab)
• Snowflake JDBC Driver Release Notes (opens in a new tab)
• Snowflake Node.js Driver Release Notes (opens in a new tab)
• Snowflake Connector for .NET Release Notes (opens in a new tab)
• Snowflake ODBC Driver Release Notes (opens in a new tab)
• Snowflake PHP PDO Driver Release Notes (opens in a new tab)
• Snowflake Libsnowflakeclient Release Notes (opens in a new tab)

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2026-86600](https://trackcve.app/badge/CVE-2026-86600.svg)](https://trackcve.app/cve/CVE-2026-86600)

Record last updated 10 Sept 2026, 15:23 UTC.