CVE-2026-86600

Workload identity attestation generated before login host validation in Snowflake drivers

Published Sep 8, 2026 CVSS 3.1 · 8.2 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

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History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Snowflake
Snowflake libsnowflakeclient
Snowflake snowflake-connector-python
Snowflake snowflake Connector For .net
Snowflake snowflake Connector For Python
Snowflake snowflake Go Driver
Snowflake snowflake Jdbc Driver
Snowflake snowflake Node.js Driver
Snowflake snowflake Odbc Driver
Snowflake snowflake Php Pdo Driver
Vendors & Products Snowflake
Snowflake libsnowflakeclient
Snowflake snowflake-connector-python
Snowflake snowflake Connector For .net
Snowflake snowflake Connector For Python
Snowflake snowflake Go Driver
Snowflake snowflake Jdbc Driver
Snowflake snowflake Node.js Driver
Snowflake snowflake Odbc Driver
Snowflake snowflake Php Pdo Driver
Type Values Removed Values Added
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.
Title Workload identity attestation generated before login host validation in Snowflake drivers
Weaknesses CWE-441
CWE-522
References
Metrics cvssV3_1

{'score': 8.2, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N'}