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.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Snowflake Snowflake Connector for Python unaffected
Version Status Constraints
0 affected < 4.8.0
Snowflake Snowflake Go Driver unaffected
Version Status Constraints
1.1.5 affected ≤ 1.19.1
Snowflake Snowflake Go Driver unaffected
Version Status Constraints
2.0.0 affected < 2.3.0
Snowflake Snowflake JDBC Driver unaffected
Version Status Constraints
3.2.3 affected < 4.4.0
Snowflake Snowflake JDBC Driver (FIPS) unaffected
Version Status Constraints
3.2.3 affected < 4.4.0
Snowflake Snowflake JDBC Driver (Thin) unaffected
Version Status Constraints
3.2.3 affected < 4.4.0
Snowflake Snowflake Node.js Driver unaffected
Version Status Constraints
1.6.0 affected < 3.4.0
Snowflake Snowflake Connector for .NET unaffected
Version Status Constraints
1.0.12 affected < 6.3.0
Snowflake Snowflake ODBC Driver unaffected
Version Status Constraints
3.7.0 affected < 4.0.0
Snowflake Snowflake PHP PDO Driver unaffected
Version Status Constraints
3.2.0 affected < 4.3.0
Snowflake Snowflake Libsnowflakeclient unaffected
Version Status Constraints
2.1.0 affected < 2.11.1

No data.

No data.

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Project Subscriptions

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Advisories

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://docs.snowflake.com/en/release-notes/clients-drivers/dotnet-2026#version-630-september-30-2026 cve-icon cve-icon
https://docs.snowflake.com/en/release-notes/clients-drivers/golang-2026#version-230-sep-30-2026 cve-icon cve-icon
https://docs.snowflake.com/en/release-notes/clients-drivers/jdbc-2026#version-440-sep-30-2026 cve-icon cve-icon
https://docs.snowflake.com/en/release-notes/clients-drivers/nodejs-2026#version-340-september-30-2026 cve-icon cve-icon
https://docs.snowflake.com/en/release-notes/clients-drivers/odbc-2026#version-400-sep-30-2026 cve-icon cve-icon
https://docs.snowflake.com/en/release-notes/clients-drivers/php-pdo-2026#version-430-oct-1-2026 cve-icon cve-icon
https://github.com/snowflakedb/libsnowflakeclient/releases/tag/v2.11.1 cve-icon cve-icon
https://github.com/snowflakedb/snowflake-connector-python/releases/tag/v4.8.0 cve-icon cve-icon
History

Wed, 04 Nov 2026 11:30:00 +0000

Type Values Removed Values Added
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.
Title Missing origin validation for the externalbrowser authenticator callback in multiple Snowflake client drivers
Weaknesses CWE-346
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: SNOWFLAKE

Published:

Updated: 2026-11-04T11:22:52.845Z

Reserved: 2026-10-21T14:36:58.722Z

Link: CVE-2026-114456

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-11-04T12:17:06.033

Modified: 2026-11-04T12:17:06.033

Link: CVE-2026-114456

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-04T12:30:10Z

Weaknesses