CVE-2026-15925 PUBLISHED

Improper TLS Hostname Verification in Snowflake Connector for Python

Assigner: SNOWFLAKE
Reserved: 16.07.2026 Published: 16.07.2026 Updated: 16.07.2026

Improper TLS hostname verification in Snowflake Connector for Python versions prior to 4.7.1 and 3.18.1 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 versions 4.7.1 and 3.18.1. Users must manually upgrade.

Metrics

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
CVSS Score: 9.2

Product Status

Vendor Snowflake
Product Snowflake Connector for Python
Versions Default: unaffected
  • affected from 3.17.4 to 3.18.1 (excl.)
  • affected from 4.0.0 to 4.7.1 (excl.)

References

Problem Types

  • Improper Validation of Certificate with Host Mismatch CWE