CVE-2026-114456: Missing origin validation for the externalbrowser authenticator callback in multiple Snowflake client drivers
Description
Multiple Snowflake client drivers implementing the `authenticator=externalbrowser` single sign-on flow could have allowed an attacker to interfere with a user's login attempt through weaknesses in the local loopback callback listener used to receive the identity provider's response. The listener reflected an arbitrary request's Origin header into its CORS response headers and accepted the first token-bearing request it received during the login window without verifying a CSRF state value bound to that specific login attempt. An attacker able to reach the listener during an active login might have leveraged this to submit a forged callback response, causing the authentication attempt to fail. The fix is available in Snowflake Connector for Python 4.8.0, Snowflake Go Driver v2.3.0, Snowflake JDBC Driver 4.4.0 (including the snowflake-jdbc-fips and snowflake-jdbc-thin artifacts), Snowflake Node.js Driver 3.4.0, Snowflake Connector for .NET 6.3.0, Snowflake ODBC Driver 4.0.0, Snowflake PHP PDO Driver 4.3.0, and libsnowflakeclient 2.11.1. Go v1 users must migrate to the latest major version of the module. Users must manually upgrade.
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H · CWE-346
Tracked companies
Mapped from the CVE’s affected-product data, NVD CPE matches, vendor advisories or package feeds. A mapping means the vendor’s software is named, not that its hosted service was exposed.
Status incidents that name it
No tracked status incident names this CVE.
Affected vendors and products
Snowflake: Snowflake Connector for .NETSnowflake: Snowflake Connector for PythonSnowflake: Snowflake Go DriverSnowflake: Snowflake JDBC DriverSnowflake: Snowflake JDBC Driver (FIPS)Snowflake: Snowflake JDBC Driver (Thin)Snowflake: Snowflake LibsnowflakeclientSnowflake: Snowflake Node.js DriverSnowflake: Snowflake ODBC DriverSnowflake: Snowflake PHP PDO Driver
References
- CVE record on cve.org (opens in new tab)
- NVD entry (opens in new tab)
- docs.snowflake.com/en/release-notes/clients-drivers/dotnet-2026 (opens in new tab)
- docs.snowflake.com/en/release-notes/clients-drivers/golang-2026 (opens in new tab)
- docs.snowflake.com/en/release-notes/clients-drivers/jdbc-2026 (opens in new tab)
- docs.snowflake.com/en/release-notes/clients-drivers/nodejs-2026 (opens in new tab)
- docs.snowflake.com/en/release-notes/clients-drivers/odbc-2026 (opens in new tab)
- docs.snowflake.com/en/release-notes/clients-drivers/php-pdo-2026 (opens in new tab)
- github.com/snowflakedb/libsnowflakeclient/releases/tag/v2.11.1 (opens in new tab)
- github.com/snowflakedb/snowflake-connector-python/releases/tag/v4.8.0 (opens in new tab)
- CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (opens in new tab)
- This product uses data from the NVD API but is not endorsed or certified by the NVD. (opens in new tab)
- Known Exploited Vulnerabilities catalog from CISA. (opens in new tab)
- EPSS scores from FIRST (Exploit Prediction Scoring System). (opens in new tab)