CVE-2026-114456
Missing origin validation for the externalbrowser authenticator callback in multiple Snowflake client drivers
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.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| Snowflake Connector for Python Snowflake snowflake-connector-python
https://pypi.org |
≥ 0; < 4.8.0 (affected, python)
Other versions: unaffected |
CNA: SNOWFLAKE |
| Snowflake Go Driver Snowflake github.com/snowflakedb/gosnowflake
https://pkg.go.dev |
≥ 1.1.5; ≤ 1.19.1 (affected, semver)
Other versions: unaffected |
CNA: SNOWFLAKE |
| Snowflake Go Driver Snowflake github.com/snowflakedb/gosnowflake/v2
https://pkg.go.dev |
≥ 2.0.0; < 2.3.0 (affected, semver)
Other versions: unaffected |
CNA: SNOWFLAKE |
| Snowflake JDBC Driver Snowflake net.snowflake:snowflake-jdbc
https://repo.maven.apache.org/maven2 |
≥ 3.2.3; < 4.4.0 (affected, maven)
Other versions: unaffected |
CNA: SNOWFLAKE |
| Snowflake JDBC Driver (FIPS) Snowflake net.snowflake:snowflake-jdbc-fips
https://repo.maven.apache.org/maven2 |
≥ 3.2.3; < 4.4.0 (affected, maven)
Other versions: unaffected |
CNA: SNOWFLAKE |
| Snowflake JDBC Driver (Thin) Snowflake net.snowflake:snowflake-jdbc-thin
https://repo.maven.apache.org/maven2 |
≥ 3.2.3; < 4.4.0 (affected, maven)
Other versions: unaffected |
CNA: SNOWFLAKE |
| Snowflake Node.js Driver Snowflake snowflake-sdk
https://registry.npmjs.org |
≥ 1.6.0; < 3.4.0 (affected, semver)
Other versions: unaffected |
CNA: SNOWFLAKE |
| Snowflake Connector for .NET Snowflake Snowflake.Data
https://www.nuget.org |
≥ 1.0.12; < 6.3.0 (affected, semver)
Other versions: unaffected |
CNA: SNOWFLAKE |
| Snowflake ODBC Driver Snowflake |
≥ 3.7.0; < 4.0.0 (affected, semver)
Other versions: unaffected |
CNA: SNOWFLAKE |
| Snowflake PHP PDO Driver Snowflake |
≥ 3.2.0; < 4.3.0 (affected, semver)
Other versions: unaffected |
CNA: SNOWFLAKE |
| Snowflake Libsnowflakeclient Snowflake |
≥ 2.1.0; < 2.11.1 (affected, semver)
Other versions: unaffected |
CNA: SNOWFLAKE |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 6.5 medium |
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H | CNA: SNOWFLAKE |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/snowflakedb/snowflake-connector-python/releases/tag/v4.8.0CNA: SNOWFLAKE
- https://docs.snowflake.com/en/release-notes/clients-drivers/golang-2026#version-230-sep-30-2026CNA: SNOWFLAKE
- https://docs.snowflake.com/en/release-notes/clients-drivers/jdbc-2026#version-440-sep-30-2026CNA: SNOWFLAKE
- https://docs.snowflake.com/en/release-notes/clients-drivers/nodejs-2026#version-340-september-30-2026CNA: SNOWFLAKE
- https://docs.snowflake.com/en/release-notes/clients-drivers/dotnet-2026#version-630-september-30-2026CNA: SNOWFLAKE
- https://docs.snowflake.com/en/release-notes/clients-drivers/odbc-2026#version-400-sep-30-2026CNA: SNOWFLAKE
- https://docs.snowflake.com/en/release-notes/clients-drivers/php-pdo-2026#version-430-oct-1-2026CNA: SNOWFLAKE
- https://github.com/snowflakedb/libsnowflakeclient/releases/tag/v2.11.1CNA: SNOWFLAKE
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