8.2
HIGH CVSS 3.1
CVE-2026-86600
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.

INFO

Published Date :

Sept. 8, 2026, 4:18 p.m.

Last Modified :

Sept. 8, 2026, 4:18 p.m.

Remotely Exploit :

Yes !

Source :

412d305a-227d-44f9-a262-a31ba44f2aea
Affected Products

The following products are affected by CVE-2026-86600 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

No affected product recoded yet

CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 HIGH 412d305a-227d-44f9-a262-a31ba44f2aea
Solution
Upgrade Snowflake drivers to restrict authentication to recognized Snowflake hosts.
  • Upgrade Snowflake drivers to patched versions.
  • Restrict authentication to recognized Snowflake hosts.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-86600 is associated with the following CWEs:

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-86600 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2026-86600 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • New CVE Received by 412d305a-227d-44f9-a262-a31ba44f2aea

    Sep. 08, 2026

    Action Type Old Value New Value
    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.
    Added CVSS V3.1 AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
    Added CWE CWE-441
    Added CWE CWE-522
    Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/86xxx/CVE-2026-86600.json">CVE-2026-86600</a>
    Added Reference https://docs.snowflake.com/en/release-notes/clients-drivers/dotnet-2026#version-610-september-3-2026
    Added Reference https://docs.snowflake.com/en/release-notes/clients-drivers/golang-2026#version-220-sep-03-2026
    Added Reference https://docs.snowflake.com/en/release-notes/clients-drivers/jdbc-2026#version-434-sep-03-2026
    Added Reference https://docs.snowflake.com/en/release-notes/clients-drivers/nodejs-2026#version-330-september-3-2026
    Added Reference https://docs.snowflake.com/en/release-notes/clients-drivers/odbc-2026#version-3200-sep-3-2026
    Added Reference https://docs.snowflake.com/en/release-notes/clients-drivers/php-pdo-2026#version-420-sep-3-2026
    Added Reference https://github.com/snowflakedb/libsnowflakeclient/releases/tag/v2.10.0
    Added Reference https://github.com/snowflakedb/snowflake-connector-python/releases/tag/v4.7.3
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.