Snowflake Connector for Python Identifier Escaping write_pandas sql injection

Summaryinfo

A vulnerability described as critical has been identified in Snowflake Connector for Python and Snowflake Connector for Python Universal Core. This issue affects the function write_pandas of the component Identifier Escaping. Such manipulation leads to sql injection. This vulnerability is documented as CVE-2026-123859. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Snowflake Connector for Python and Snowflake Connector for Python Universal Core (unknown version) and classified as critical. Affected by this issue is the function write_pandas of the component Identifier Escaping. The manipulation with an unknown input leads to a sql injection vulnerability. Using CWE to declare the problem leads to CWE-89. The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data. Impacted is confidentiality, integrity, and availability. CVE summarizes:

When identifier escaping is disabled through a non-default configuration, the write_pandas() data-loading functionality in the Snowflake Connector for Python and the Snowflake Connector for Python (Universal Core) did not escape DataFrame column names before including them in generated SQL, which could allow SQL injection. In both products, a crafted column name could have been used to chain additional SQL statements onto the generated statement, potentially allowing an attacker to read, modify, or delete other data accessible to the application's Snowflake role. Exploitation required an application to pass attacker controlled column names into this functionality. The fix is available in Snowflake Connector for Python version 4.8.1 and Snowflake Connector for Python (Universal Core) version 5.2.0. Users must upgrade manually.

The advisory is shared for download at docs.snowflake.com. This vulnerability is handled as CVE-2026-123859 since 11/06/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 11/06/2026). The MITRE ATT&CK project declares the attack technique as T1505.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• Programming Language Software

Vendor

• Snowflake

Name

• Connector for Python
• Snowflake Connector for Python Universal Core

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