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CVE-2026-86600— Workload identity attestation generated before login host validation in Snowflake drivers

Quick assessment

Affected
Snowflake Snowflake Connector for Python
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在受影响的 Snowflake 驱动程序中，WORKLOAD_IDENTITY 认证会请求一个云工作负载身份令牌，并将其附加到登录请求中，但未验证所配置的主机是否为 Snowflake 端点。能够修改连接配置的 attackers 可以诱导驱动程序生成一个新的证明令牌（attestation token），并将其发送至攻击者控制的主机。被截获的令牌可以在该工作负载身份已注册的账户中，在其剩余有效期内被重放到 Snowflake。在 Azure 上，令牌的目标受众（audience）也是从连接配置中获取的。结合攻击者

CVSS 8.2 · High

Affected Version Matrix 8

VendorProduct Version RangeStatus
Snowflake Snowflake Connector for .NET 4.7.0< 6.1.0 affected
Snowflake Snowflake Connector for Python 3.14.1< 4.7.3 affected
Snowflake Snowflake Go Driver 1.15.0< 2.2.0 affected
Snowflake Snowflake JDBC Driver 3.24.0< 4.3.4 affected
Snowflake Snowflake Libsnowflakeclient 2.2.0< 2.10.0 affected
Snowflake Snowflake Node.js Driver 2.1.1< 3.3.0 affected
Snowflake Snowflake ODBC Driver 3.9.0< 3.20.0 affected
Snowflake Snowflake PHP PDO Driver 3.6.0< 4.2.0 affected
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I. Basic Information for CVE-2026-86600

Vulnerability Information
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Vulnerability Title
Workload identity attestation generated before login host validation in Snowflake drivers
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
不充分的凭证保护机制
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Snowflake Snowflake Connector for Python 3.14.1 ~ 4.7.3 -
Snowflake Snowflake Go Driver 1.15.0 ~ 2.2.0 -
Snowflake Snowflake JDBC Driver 3.24.0 ~ 4.3.4 -
Snowflake Snowflake Node.js Driver 2.1.1 ~ 3.3.0 -
Snowflake Snowflake Connector for .NET 4.7.0 ~ 6.1.0 -
Snowflake Snowflake ODBC Driver 3.9.0 ~ 3.20.0 -
Snowflake Snowflake PHP PDO Driver 3.6.0 ~ 4.2.0 -
Snowflake Snowflake Libsnowflakeclient 2.2.0 ~ 2.10.0 -

II. Public POCs for CVE-2026-86600

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III. Intelligence Information for CVE-2026-86600

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Vendor Pages for CVE-2026-86600 (7)

Other References for CVE-2026-86600 (1)

IV. Related Vulnerabilities

Same product: Snowflake Connector for Python
Same vendor: Snowflake
Same weakness: CWE-522

V. Comments for CVE-2026-86600

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