Affects Snowflake Python connectors widely used for enterprise data loads; SQL injection can expose or alter production data across organizations.
CVE-2026-123859
SQL injection in Snowflake Python connectors via crafted DataFrame column names
Is CVE-2026-123859 being exploited?
Not confirmed. CVE-2026-123859 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked.
How severe is CVE-2026-123859?
CVE-2026-123859 is rated High with a CVSS score of 8.1. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-123859?
Yes. A fix has been recorded for CVE-2026-123859. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-123859 affect?
CVE-2026-123859 affects Snowflake Connector for Python < 4.8.1, Snowflake Connector for Python (Universal Core) < 5.2.0. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-123859?
Upgrade to 4.8.1 (Python) and 5.2.0 (Universal Core); disallow or sanitize untrusted column names.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
SQL injection allows attacker-controlled column names to read, modify, or delete data accessible to the application's Snowflake role.
Immediate action required
- affected>= 2.3.4 and < 4.8.1
- affected>= 5.0.0b1 and < 5.2.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.
cisa ssvc
- exploitation
- none
- automatable
- no
- technical impact
- total
Assessed by CISA 6 Nov 2026 (SSVC 2.0.3).
timeline
- 6 Nov 2026Published
- 6 Nov 2026CISA SSVC assessment: exploitation none · same day later
- 6 Nov 2026CVE record last updated · same day later
- 7 Nov 2026Analysed by vulneraibility.com · 1 day later
- Linkdocs.snowflake.com /en/release-notes/clients-drivers/python-connector-2026#version-481-oct-26-2026
- Linkdocs.snowflake.com /en/release-notes/clients-drivers/python-connector-2026#version-520-nov-4-2026
sources
- CVE List (CVE.org): description, affected versions, references; CVE Terms of Use
- NVD: CVSS and CPE data
- CISA Vulnrichment (ADP): SSVC decision points
- FIRST EPSS: exploit probability and percentile
- Summary, impact and triage tags: written by our AI analysis pipeline from the sources above. Check them against the sources.