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Advisory record · GHSA-5cc2-282f-jjq2

Snowflake Connector for Python improperly verifies TLS hostnames

CVSS 9.2 CriticalCriticalEPSS 0.0018 · 7th percentile

Critical, because:

  • CVSS score 9.2: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 16 Jul 2026, 09:32 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
snowflake-connector-pythonPyPI<3.18.1 || >=4.0.0, <4.7.13.18.1, 4.7.1
Identifiers
GHSA-5cc2-282f-jjq2 · CVE-2026-15925 · PYSEC-2026-3920
Weakness (CWE)
CWE-297
Tags
Published
16 Jul 2026
Updated
10 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Snowflake Connector for Python versions before 3.18.1, and versions 4.0.0 up to 4.7.1, do not properly verify TLS hostnames on HTTPS connections. An attacker with on-path network access, such as through ARP or DNS poisoning or a rogue proxy, could present a certificate from any trusted CA and intercept or alter traffic, potentially exposing credentials and query data. Upgrade to version 3.18.1 or 4.7.1.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
9.2 Critical 4.0 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 CNA (SNOWFLAKE)
  • CISA KEV Not listed.
  • EPSS 0.0018, the 7th percentile, on 10 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:10 UTC First seen by agentprime
  2. 31 Oct 2026, 14:10 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.