CVE-2026-86600Workload identity attestation generated before login host validation in Snowflake drivers
Updated under an hour ago ()
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It affects Snowflake Connector for Python and 9 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 8.2 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
- Weakness (CWE)
- CWE-522, CWE-441
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- SNOWFLAKE
- NVD analysis
- Awaiting Analysis
- Record last updated
- Sep 10, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Snowflake Snowflake Connector for Python snowflake:connector_for_python (from the name) | from 3.14.1 before 4.7.3 | CNA record |
Snowflake Snowflake Go Driver snowflake:go_driver (from the name) | from 1.15.0 through 1.19.1 | CNA record |
Snowflake Snowflake JDBC Driver snowflake:jdbc_driver (from the name) | from 3.24.0 before 4.3.4 | CNA record |
Snowflake Snowflake JDBC Driver (FIPS) snowflake:jdbc_driver_fips (from the name) | from 3.24.0 before 4.3.4 | CNA record |
Snowflake Snowflake JDBC Driver (Thin) snowflake:jdbc_driver_thin (from the name) | from 3.24.0 before 4.3.4 | CNA record |
Snowflake Snowflake Node.js Driver snowflake:node.js_driver (from the name) | from 2.1.1 before 3.3.0 | CNA record |
Snowflake Snowflake Connector for .NET snowflake:connector_for_net (from the name) | from 4.7.0 before 6.1.0 | CNA record |
Snowflake Snowflake ODBC Driver snowflake:odbc_driver (from the name) | from 3.9.0 before 3.20.0 | CNA record |
Snowflake Snowflake PHP PDO Driver snowflake:php_pdo_driver (from the name) | from 3.6.0 before 4.2.0 | CNA record |
Snowflake Snowflake Libsnowflakeclient snowflake:libsnowflakeclient (from the name) | from 2.2.0 before 2.10.0 | CNA record |
References
- https://github.com/snowflakedb/snowflake-connector-python/releases/tag/v4.7.3
- https://docs.snowflake.com/en/release-notes/clients-drivers/golang-2026#version-220-sep-03-2026
- https://docs.snowflake.com/en/release-notes/clients-drivers/jdbc-2026#version-434-sep-03-2026
- https://docs.snowflake.com/en/release-notes/clients-drivers/nodejs-2026#version-330-september-3-2026
- https://docs.snowflake.com/en/release-notes/clients-drivers/dotnet-2026#version-610-september-3-2026
- https://docs.snowflake.com/en/release-notes/clients-drivers/odbc-2026#version-3200-sep-3-2026
- https://docs.snowflake.com/en/release-notes/clients-drivers/php-pdo-2026#version-420-sep-3-2026
- https://github.com/snowflakedb/libsnowflakeclient/releases/tag/v2.10.0
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.