Snowflake libsnowflakeclient up to 2.9.1 redirect

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Snowflake libsnowflakeclient up to 2.9.1. This issue affects some unknown processing. The manipulation leads to redirect. This vulnerability is traded as CVE-2026-16870. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Snowflake libsnowflakeclient up to 2.9.1. It has been rated as problematic. This issue affects an unknown functionality. The manipulation with an unknown input leads to a redirect vulnerability. Using CWE to declare the problem leads to CWE-601. A web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a Redirect. This simplifies phishing attacks. Impacted is integrity. The summary by CVE is:

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. Users must manually upgrade.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-16870 since 07/24/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1204.001 according to MITRE ATT&CK.

Upgrading to version 2.9.2 eliminates this vulnerability.

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Productinfo

Vendor

• Snowflake

Name

• libsnowflakeclient

Version

• 2.9.0
• 2.9.1

CPE 2.3info

• 🔒
• 🔒

CPE 2.2info

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• 🔒

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