# CVE-2026-114456: Missing origin validation for the externalbrowser authenticator callback in multiple Snowflake client drivers

Status: published. Published: 2026-11-04. Updated: 2026-11-04.

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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Snowflake / Snowflake Connector for Python (snowflake-connector-python): ≥ 0; < 4.8.0 (affected, python). Source: CNA: SNOWFLAKE
- Snowflake / Snowflake Go Driver (github.com/snowflakedb/gosnowflake): ≥ 1.1.5; ≤ 1.19.1 (affected, semver). Source: CNA: SNOWFLAKE
- Snowflake / Snowflake Go Driver (github.com/snowflakedb/gosnowflake/v2): ≥ 2.0.0; < 2.3.0 (affected, semver). Source: CNA: SNOWFLAKE
- Snowflake / Snowflake JDBC Driver (net.snowflake:snowflake-jdbc): ≥ 3.2.3; < 4.4.0 (affected, maven). Source: CNA: SNOWFLAKE
- Snowflake / Snowflake JDBC Driver (FIPS) (net.snowflake:snowflake-jdbc-fips): ≥ 3.2.3; < 4.4.0 (affected, maven). Source: CNA: SNOWFLAKE
- Snowflake / Snowflake JDBC Driver (Thin) (net.snowflake:snowflake-jdbc-thin): ≥ 3.2.3; < 4.4.0 (affected, maven). Source: CNA: SNOWFLAKE
- Snowflake / Snowflake Node.js Driver (snowflake-sdk): ≥ 1.6.0; < 3.4.0 (affected, semver). Source: CNA: SNOWFLAKE
- Snowflake / Snowflake Connector for .NET (Snowflake.Data): ≥ 1.0.12; < 6.3.0 (affected, semver). Source: CNA: SNOWFLAKE
- Snowflake / Snowflake ODBC Driver: ≥ 3.7.0; < 4.0.0 (affected, semver). Source: CNA: SNOWFLAKE
- Snowflake / Snowflake PHP PDO Driver: ≥ 3.2.0; < 4.3.0 (affected, semver). Source: CNA: SNOWFLAKE
- Snowflake / Snowflake Libsnowflakeclient: ≥ 2.1.0; < 2.11.1 (affected, semver). Source: CNA: SNOWFLAKE

## Severity and prioritization

- CVSS 3.1: 6.5 (medium); CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H; source: CNA: SNOWFLAKE

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-346

## 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/v4.8.0 (CNA: SNOWFLAKE)

- https://docs.snowflake.com/en/release-notes/clients-drivers/golang-2026#version-230-sep-30-2026 (CNA: SNOWFLAKE)

- https://docs.snowflake.com/en/release-notes/clients-drivers/jdbc-2026#version-440-sep-30-2026 (CNA: SNOWFLAKE)

- https://docs.snowflake.com/en/release-notes/clients-drivers/nodejs-2026#version-340-september-30-2026 (CNA: SNOWFLAKE)

- https://docs.snowflake.com/en/release-notes/clients-drivers/dotnet-2026#version-630-september-30-2026 (CNA: SNOWFLAKE)

- https://docs.snowflake.com/en/release-notes/clients-drivers/odbc-2026#version-400-sep-30-2026 (CNA: SNOWFLAKE)

- https://docs.snowflake.com/en/release-notes/clients-drivers/php-pdo-2026#version-430-oct-1-2026 (CNA: SNOWFLAKE)

- https://github.com/snowflakedb/libsnowflakeclient/releases/tag/v2.11.1 (CNA: SNOWFLAKE)

## Provenance

- CNA: SNOWFLAKE: https://www.cve.org/CVERecord?id=CVE-2026-114456; retrieved 2026-11-04; source updated 2026-11-04

Revision: 1a5caa0c4c308235888adabf4e904919513ef988b5c0e80e3002093dacff31d1

Canonical: https://y2.dev/cve/CVE-2026-114456

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