CVE-2026-85528: Snowflake Jdbc Driver

Medium severity, CVSS 5.3. EPSS: 0.3% chance of exploitation in the next 30 days.

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, including the snowflake-jdbc-fips and snowflake-jdbc-thin. Users must manually upgrade.

Affected products

• Snowflake Snowflake Jdbc Driver: from 4.2.0, before 4.3.4 (fixed in 4.3.4)
• Snowflake Snowflake Jdbc Driver Fips: from 4.2.0, before 4.3.4 (fixed in 4.3.4)
• Snowflake Snowflake Jdbc Driver Thin: from 4.2.0, before 4.3.4 (fixed in 4.3.4)

Published 2026-09-04. Last modified 2026-09-10.