# CVE-2026-16870: Multiple Security Vulnerabilities in Snowflake libsnowflakeclient

> CVE-2026-16870: Multiple Security Vulnerabilities in Snowflake libsnowflakeclient. CVSS 8.8 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-16870
Last updated: 2026-07-30T19:07:59Z

- Published: 2026-07-24 04:40 UTC · Updated: 2026-07-30 19:07 UTC · Assigner: SNOWFLAKE
- CVSS: 8.8 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS: 1.3%, 70th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-121, CWE-787, CWE-918

## Description

Multiple security vulnerabilities in Snowflake libsnowflakeclient versions prior to 2.9.2 could allow remote code execution and credential exfiltration. A stack-based buffer overflow in the file download path could allow remote code execution on a victim host. An attacker could exploit this by uploading a file with a crafted encryption metadata field to a shared internal stage that a victim process later downloads, and impact would be limited to deployments where principals with different privilege levels share the same internal stage. A related out-of-bounds write in the same download path could allow memory corruption with attacker-controlled write primitives. An attacker may exploit this through a crafted initialization vector metadata field on a shared stage, and impact would be limited by the same stage-write precondition. Improper validation of connection parameters could allow an attacker-controlled input to redirect outbound authentication requests — including credentials and tokens — to an attacker-controlled endpoint. Impact is limited to embedding deployments where a lower-privileged principal can influence connection configuration while higher-privileged service credentials are in use. The fix is available in Snowflake libsnowflakeclient version 2.9.2. The Snowflake PHP PDO Driver and Snowflake ODBC Driver embed the affected library; fixes are available in versions 4.1.0 and 3.19.0 respectively. Users must manually upgrade.

## Affected vendors and products

- Snowflake: Snowflake libsnowflakeclient
- Snowflake: Snowflake ODBC Driver
- Snowflake: Snowflake PHP PDO Driver

## Tracked companies

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

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-16870)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-16870)
- [https://github.com/snowflakedb/libsnowflakeclient/releases/tag/v2.9.2](https://github.com/snowflakedb/libsnowflakeclient/releases/tag/v2.9.2)

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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-2026-16870 · Markdown: https://rewindex.com/cve/CVE-2026-16870.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-16870 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:15:37.373Z