Snowflake Libsnowflakeclient
Monthly
Workload Identity Federation authentication in all major Snowflake client drivers transmits cloud attestation tokens to the configured host without first verifying that host is a recognized Snowflake endpoint, enabling token exfiltration and replay. An attacker who can modify connection configuration redirects the driver to an attacker-controlled server, which receives a freshly minted cloud workload-identity token that can be replayed against real Snowflake accounts for the token's remaining lifetime. On Azure, the attack surface is wider: the driver also fetches a Managed Identity access token scoped to an arbitrary Azure resource chosen by the attacker, extending potential impact beyond Snowflake to any Azure service that workload identity can reach. No public exploit has been identified at time of analysis, but vendor-confirmed patches were released September 3, 2026 across all eight affected driver packages.
Remote code execution and credential exfiltration in Snowflake libsnowflakeclient versions before 2.9.2 stem from three distinct flaws in the C client library: a stack-based buffer overflow (CWE-121) and an out-of-bounds write in the file-download path, plus improper validation of connection parameters. A lower-privileged principal sharing an internal stage can plant a file with crafted encryption metadata that corrupts memory in a higher-privileged victim process, while the connection-parameter flaw can redirect outbound authentication requests carrying credentials and tokens to an attacker endpoint. There is no public exploit identified at time of analysis and the CVE is not in CISA KEV; the vendor fixed all issues in 2.9.2, which users must manually install.
Workload Identity Federation authentication in all major Snowflake client drivers transmits cloud attestation tokens to the configured host without first verifying that host is a recognized Snowflake endpoint, enabling token exfiltration and replay. An attacker who can modify connection configuration redirects the driver to an attacker-controlled server, which receives a freshly minted cloud workload-identity token that can be replayed against real Snowflake accounts for the token's remaining lifetime. On Azure, the attack surface is wider: the driver also fetches a Managed Identity access token scoped to an arbitrary Azure resource chosen by the attacker, extending potential impact beyond Snowflake to any Azure service that workload identity can reach. No public exploit has been identified at time of analysis, but vendor-confirmed patches were released September 3, 2026 across all eight affected driver packages.
Remote code execution and credential exfiltration in Snowflake libsnowflakeclient versions before 2.9.2 stem from three distinct flaws in the C client library: a stack-based buffer overflow (CWE-121) and an out-of-bounds write in the file-download path, plus improper validation of connection parameters. A lower-privileged principal sharing an internal stage can plant a file with crafted encryption metadata that corrupts memory in a higher-privileged victim process, while the connection-parameter flaw can redirect outbound authentication requests carrying credentials and tokens to an attacker endpoint. There is no public exploit identified at time of analysis and the CVE is not in CISA KEV; the vendor fixed all issues in 2.9.2, which users must manually install.