---
id: CVE-2026-114456
title: >-
  Missing origin validation for the externalbrowser authenticator callback in
  multiple Snowflake client drivers
summary: >-
  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 use…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-346
vendor: Snowflake
product: snowflake-connector-python
affected:
  - snowflake-connector-python < 4.8.0
  - github.com/snowflakedb/gosnowflake >= 1.1.5 <= 1.19.1
  - github.com/snowflakedb/gosnowflake/v2 >= 2.0.0 < 2.3.0
  - 'net.snowflake:snowflake-jdbc >= 3.2.3 < 4.4.0'
  - 'net.snowflake:snowflake-jdbc-fips >= 3.2.3 < 4.4.0'
  - 'net.snowflake:snowflake-jdbc-thin >= 3.2.3 < 4.4.0'
  - snowflake-sdk >= 1.6.0 < 3.4.0
  - Snowflake.Data >= 1.0.12 < 6.3.0
  - odbc_driver >= 3.7.0 < 4.0.0
  - php_pdo_driver >= 3.2.0 < 4.3.0
  - libsnowflakeclient >= 2.1.0 < 2.11.1
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-04T18:20:22.194471Z'
published: '2026-11-04'
updated: '2026-11-04'
sourceUpdated: '2026-11-04T20:00:58.177Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-114456'
references:
  - url: >-
      https://github.com/snowflakedb/snowflake-connector-python/releases/tag/v4.8.0
    label: Snowflake Connector for Python Release Notes
  - url: >-
      https://docs.snowflake.com/en/release-notes/clients-drivers/golang-2026#version-230-sep-30-2026
    label: Snowflake Go Driver Release Notes
  - url: >-
      https://docs.snowflake.com/en/release-notes/clients-drivers/jdbc-2026#version-440-sep-30-2026
    label: Snowflake JDBC Driver Release Notes
  - url: >-
      https://docs.snowflake.com/en/release-notes/clients-drivers/nodejs-2026#version-340-september-30-2026
    label: Snowflake Node.js Driver Release Notes
  - url: >-
      https://docs.snowflake.com/en/release-notes/clients-drivers/dotnet-2026#version-630-september-30-2026
    label: Snowflake Connector for .NET Release Notes
  - url: >-
      https://docs.snowflake.com/en/release-notes/clients-drivers/odbc-2026#version-400-sep-30-2026
    label: Snowflake ODBC Driver Release Notes
  - url: >-
      https://docs.snowflake.com/en/release-notes/clients-drivers/php-pdo-2026#version-430-oct-1-2026
    label: Snowflake PHP PDO Driver Release Notes
  - url: 'https://github.com/snowflakedb/libsnowflakeclient/releases/tag/v2.11.1'
    label: Snowflake Libsnowflakeclient Release Notes
tags:
  - cve.org
ingestedAt: '2026-11-05T21:36:00.525Z'
epss: 0.00222
epssPercentile: 0.12935
---

## Overview

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.

## Affected

- `snowflake-connector-python < 4.8.0`
- `github.com/snowflakedb/gosnowflake >= 1.1.5 <= 1.19.1`
- `github.com/snowflakedb/gosnowflake/v2 >= 2.0.0 < 2.3.0`
- `net.snowflake:snowflake-jdbc >= 3.2.3 < 4.4.0`
- `net.snowflake:snowflake-jdbc-fips >= 3.2.3 < 4.4.0`
- `net.snowflake:snowflake-jdbc-thin >= 3.2.3 < 4.4.0`
- `snowflake-sdk >= 1.6.0 < 3.4.0`
- `Snowflake.Data >= 1.0.12 < 6.3.0`
- `odbc_driver >= 3.7.0 < 4.0.0`
- `php_pdo_driver >= 3.2.0 < 4.3.0`
- `libsnowflakeclient >= 2.1.0 < 2.11.1`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.