Snowflake Connector for Python up to 4.7.0 Hostname Verification certificate host validation

Summaryinfo

A vulnerability labeled as problematic has been found in Snowflake Connector for Python up to 4.7.0. This affects an unknown part of the component Hostname Verification. Executing a manipulation can lead to certificate host validation. This vulnerability is registered as CVE-2026-15925. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability has been found in Snowflake Connector for Python up to 4.7.0 and classified as problematic. This vulnerability affects an unknown part of the component Hostname Verification. The manipulation with an unknown input leads to a certificate host validation vulnerability. The CWE definition for the vulnerability is CWE-297. The product communicates with a host that provides a certificate, but the product does not properly ensure that the certificate is actually associated with that host. As an impact it is known to affect integrity. CVE summarizes:

Improper TLS hostname verification in Snowflake Connector for Python versions prior to 4.7.1 may have allowed a network-positioned attacker to bypass certificate hostname validation on HTTPS connections made by the connector. An attacker with on-path network access could exploit this by intercepting or redirecting network traffic and presenting a certificate signed by any trusted CA for any domain, causing the connector to accept connections without validating that the certificate matched the requested hostname. Successful exploitation requires an on-path traffic interception capability (e.g. ARP/DNS poisoning, rogue access point, BGP hijacking, or malicious proxy/exit node). This vulnerability may have exposed credentials, query data, and staged file contents to interception and tampering, and may have enabled the attacker to issue arbitrary SQL within the context of the victim's connector session. Impact is limited by the privileges of the affected Snowflake role. The fix is available in Snowflake Connector for Python version 4.7.1. Users must manually upgrade.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-15925 since 07/16/2026. The exploitation appears to be difficult. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1587.003.

Upgrading to version 4.7.1 eliminates this vulnerability.

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Productinfo

Type

• Programming Language Software

Vendor

• Snowflake

Name

• Connector for Python

Version

• 4.0
• 4.1
• 4.2
• 4.3
• 4.4
• 4.5
• 4.6
• 4.7.0

CPE 2.3info

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CPE 2.2info

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