CVE-2026-85528
Received Received - Intake

Improper Input Validation in Snowflake JDBC Driver

Publication date: 2026-09-04

Last updated on: 2026-09-04

Assigner: SNOWFLAKE

Description
Improper input validation of the auto-configuration account identifier in Snowflake JDBC Driver versions 4.2.0 through 4.3.3 allowed a credential-bearing login request to be redirected to an attacker-selected HTTPS endpoint. An attacker able to control the account value could cause the driver to transmit a reusable login credential to a host of their choosing and replay it to obtain the privileges granted to that credential. Successful exploitation requires an application using jdbc:snowflake:auto with a connections.toml section that omits an explicit host and a lower-trust principal able to set the account value; ordinary JDBC URLs are unaffected. The fix is available in Snowflake JDBC Driver version 4.3.4. Users must manually upgrade.

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Meta Information

Published
2026-09-04
Last Modified
2026-09-04
Generated
2026-09-04
AI Q&A
2026-09-04
EPSS Evaluated
N/A
NVD
CVE-2026-85528
EUVD
EUVD-2026-70974

Affected Vendors & Products

Showing 5 associated CPEs
Vendor Product Version / Range
snowflake snowflake_jdbc_driver 4.2.0
snowflake snowflake_jdbc_driver 4.3.3
snowflake snowflake_jdbc_driver From 4.3.4 (exc)
snowflake snowflake_jdbc_driver From 4.2.0 (inc) to 4.3.3 (inc)
snowflake snowflake_jdbc_driver 4.3.4

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-20 The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
CWE-918 The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

Attack-Flow Graph

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Executive Summary

This vulnerability involves improper input validation in the Snowflake JDBC Driver versions 4.2.0 through 4.3.3. It allows a login request with credentials to be redirected to an attacker-controlled HTTPS endpoint due to a flaw in handling the auto-configuration account identifier.

Detection Guidance

To detect this vulnerability, check if your application uses the Snowflake JDBC Driver versions 4.2.0 through 4.3.3 with jdbc:snowflake:auto in connections.toml without an explicit host. Inspect network traffic for unexpected HTTPS redirects during login attempts. Verify if the driver version is below 4.3.4.

Impact Analysis

An attacker could exploit this to capture and replay your login credentials, gaining unauthorized access to your Snowflake account. This requires the attacker to control the account value and for your application to use jdbc:snowflake:auto without an explicit host in connections.toml.

Compliance Impact

This vulnerability could potentially impact compliance with GDPR and HIPAA by enabling unauthorized access to credentials. If exploited, it may lead to unauthorized data access or disclosure, violating confidentiality requirements under these regulations. Organizations using affected JDBC driver versions must assess exposure and implement mitigations like upgrading to version 4.3.4 to maintain compliance.

Mitigation Strategies

Upgrade Snowflake JDBC Driver to version 4.3.4 or later. Ensure applications using jdbc:snowflake:auto with connections.toml omit an explicit host and verify account values are not controlled by untrusted principals.

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