CVE-2026-16870
HighCVSS 8.8Exploitation Probability (EPSS)
Low risk29th percentile - higher than 29% of all known CVEs
Summary
Multiple security vulnerabilities in Snowflake libsnowflakeclient 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. A related out-of-bounds write could allow memory corruption. Improper validation of connection parameters could redirect authentication requests to an attacker-controlled endpoint.
Risk Assessment
An attacker could achieve remote code execution, steal credentials or tokens, potentially leading to compromise of Snowflake data and systems.
Recommendation
Update Snowflake libsnowflakeclient to version 2.9.2, Snowflake PHP PDO Driver to 4.1.0, and Snowflake ODBC Driver to 3.19.0.
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Original NVD description (English source)
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.