What is CVE-2026-123859?

CVE-2026-123859 is a high-severity vulnerability in Snowflake Connector For Python, classified under SQL Injection. CVSS score: 8.1/10. Published 2026-11-06.

How severe is CVE-2026-123859?

High severity. CVSS v3 base score is 8.1 out of 10.

SQL Injection in Snowflake Connector For Python

CVE-2026-123859

When identifier escaping is disabled through a non-default configuration, the write_pandas() data-loading functionality in the Snowflake Connector for Python and the Snowflake Connector for Python (Universal Core) did not escape DataFrame column names before including them in generated SQL, which could allow SQL injection. In both products, a crafted column name could have been used to chain additional SQL statements onto the generated statement, potentially allowing an attacker to read, modify, or delete other data accessible to the application's Snowflake role. Exploitation required an application to pass attacker controlled column names into this functionality. The fix is available in Snowflake Connector for Python version 4.8.1 and Snowflake Connector for Python (Universal Core) version 5.2.0. Users must upgrade manually.

Vulnerability class: SQL Injection

Published 2026-11-06 · last modified 2026-11-06.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Weakness classification (CWE)

CWE-89 — SQL Injection

References

Frequently asked questions

What is CVE-2026-123859?: CVE-2026-123859 is a high-severity vulnerability in Snowflake Connector For Python, classified under SQL Injection. CVSS score: 8.1/10. Published 2026-11-06.
How severe is CVE-2026-123859?: High severity. CVSS v3 base score is 8.1 out of 10.