# CVE-2026-15925: Improper TLS Hostname Verification in Snowflake Connector for Python

> CVE-2026-15925: Improper TLS Hostname Verification in Snowflake Connector for Python. CVSS 9.2 (CVSS 4.0).

Canonical: https://rewindex.com/cve/CVE-2026-15925
Last updated: 2026-10-24T21:10:00Z

- Published: 2026-07-16 05:31 UTC · Updated: 2026-10-24 21:10 UTC · Assigner: SNOWFLAKE
- CVSS: 9.2 (CVSS 4.0) · Severity: Critical
- EPSS: 0.18%, 7th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-297

## Description

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.

## Affected vendors and products

- Snowflake: Snowflake Connector for Python

## Tracked companies

- [Snowflake](https://rewindex.com/company/snowflake.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-15925)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-15925)
- [https://github.com/snowflakedb/snowflake-connector-python/releases/tag/v3.18.1](https://github.com/snowflakedb/snowflake-connector-python/releases/tag/v3.18.1)
- [https://github.com/snowflakedb/snowflake-connector-python/releases/tag/v4.7.1](https://github.com/snowflakedb/snowflake-connector-python/releases/tag/v4.7.1)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-15925 · Markdown: https://rewindex.com/cve/CVE-2026-15925.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-15925 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:11:29.333Z