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PatchSiren cyber security CVE debrief

CVE-2026-15925 Snowflake CVE debrief

CVE-2026-15925 involves improper TLS hostname verification in Snowflake Connector for Python versions prior to 4.7.1. This issue may have allowed a network-positioned attacker to bypass certificate hostname validation on HTTPS connections made by the connector. To exploit this, an attacker would need on-path network access to intercept or redirect traffic and present a certificate signed by any trusted CA for any domain. This could lead to exposure of credentials, query data, and staged file contents to interception and tampering, and potentially allow the attacker to issue arbitrary SQL within the context of the victim's connector session. The impact is limited by the privileges of the affected Snowflake role. Users should manually upgrade to Snowflake Connector for Python version 4.7.1.

Vendor
Snowflake
Product
Snowflake Connector for Python
CVSS
CRITICAL 9.2
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-16
Original CVE updated
2026-07-16
Advisory published
2026-07-16
Advisory updated
2026-07-16

Who should care

Organizations using Snowflake Connector for Python versions prior to 4.7.1 should be aware of this vulnerability. The issue could lead to exposure of sensitive information and potential unauthorized access to Snowflake accounts. Users with on-path network access could exploit this vulnerability, making it particularly risky for networks with untrusted or unauthenticated access.

Technical summary

The Snowflake Connector for Python versions prior to 4.7.1 improperly verifies TLS hostnames. This flaw allows a network-positioned attacker to bypass certificate hostname validation by intercepting or redirecting HTTPS connections and presenting a trusted CA-signed certificate for any domain. Successful exploitation requires on-path traffic interception capabilities like ARP/DNS poisoning, rogue access points, BGP hijacking, or malicious proxies/exit nodes. The vulnerability could expose credentials, query data, and staged file contents to interception and tampering. It may also enable attackers to issue arbitrary SQL within the victim's connector session, with impact limited by the privileges of the affected Snowflake role.

Defensive priority

High

Recommended defensive actions

  • Manually upgrade to Snowflake Connector for Python version 4.7.1 or later
  • Implement robust network monitoring to detect on-path traffic interception attempts
  • Restrict network access to sensitive areas for users with on-path capabilities
  • Use secure communication protocols and validate certificates properly in other connectors and applications
  • Regularly review and update connector and library versions across the organization

Evidence notes

The CVE record was published on 2026-07-16T07:16:47.957Z and has not been modified since then. The NVD entry is currently . The vulnerability details are based on the official CVE and NVD records, as well as a reference to the Snowflake Connector for Python release notes. However, specific details about the exploitation and impact are limited in the provided source corpus.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-16T07:16:47.957Z and has not been modified since then.