Sensitive information written to logs by Snowflake drivers
Medium6.5CVE-2026-86597 · Published Sep 10, 2026
Insertion of sensitive information into log files in the Snowflake Python, Go, JDBC, Node.js, PHP PDO, and ODBC drivers allowed authentication tokens, query-result encryption keys, pre-signed cloud-storage URLs, and SAML assertions to be written to diagnostic logs in circumstances where the available log redaction did not cover all affected log paths and data types. An attacker with read access to the log destination, whether the local filesystem, a log aggregation service, or a CI/CD artifact store, could obtain credentials and decryption keys that, if still valid at the time of access, could be used to authenticate to the corresponding Snowflake account or cloud-storage object. Successful exploitation requires read access to the log destination, and impact is bounded by credential lifetime and object scope. The fix is available in Snowflake Connector for Python v4.7.3, Snowflake Go Driver v2.2.0, Snowflake JDBC Driver v4.3.4 (including the snowflake-jdbc-fips and snowflake-jdbc-thin), Snowflake Node.js Driver v3.3.0, Snowflake PHP PDO Driver v4.2.0, and Snowflake ODBC Driver v3.20.0. Users must manually upgrade and should securely delete previously generated diagnostic logs conta...
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| github.com/snowflakedb/gosnowflake Go | >= 1.0.0 | No fix yet |
| github.com/snowflakedb/gosnowflake/v2 Go | < 2.2.0 | 2.2.0 |
| net.snowflake:snowflake-jdbc Maven | < 4.3.4 | 4.3.4 |
| net.snowflake:snowflake-jdbc-fips Maven | < 4.3.4 | 4.3.4 |
| net.snowflake:snowflake-jdbc-thin Maven | < 4.3.4 | 4.3.4 |
| snowflake-connector-python PyPI | < 4.7.3 | 4.7.3 |
| Snowflake ODBC Driver Product | >= 3.16.0, < 3.20.0 | 3.20.0 |
| pdo_snowflake Product | >= 3.4.0, < 4.2.0 | 4.2.0 |
| snowflake-sdk npm | < 3.3.0 | 3.3.0 |
Details and references
Insertion of sensitive information into log files in the Snowflake Python, Go, JDBC, Node.js, PHP PDO, and ODBC drivers allowed authentication tokens, query-result encryption keys, pre-signed cloud-storage URLs, and SAML assertions to be written to diagnostic logs in circumstances where the available log redaction did not cover all affected log paths and data types. An attacker with read access to the log destination, whether the local filesystem, a log aggregation service, or a CI/CD artifact store, could obtain credentials and decryption keys that, if still valid at the time of access, could be used to authenticate to the corresponding Snowflake account or cloud-storage object. Successful exploitation requires read access to the log destination, and impact is bounded by credential lifetime and object scope. The fix is available in Snowflake Connector for Python v4.7.3, Snowflake Go Driver v2.2.0, Snowflake JDBC Driver v4.3.4 (including the snowflake-jdbc-fips and snowflake-jdbc-thin), Snowflake Node.js Driver v3.3.0, Snowflake PHP PDO Driver v4.2.0, and Snowflake ODBC Driver v3.20.0. Users must manually upgrade and should securely delete previously generated diagnostic logs containing sensitive information where retention is not required.
- CVSS 3.1
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
- Severity from
- GitHub (reviewed advisory)
- Weakness
- CWE-532
More Snowflake advisories
All Snowflake| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Sep 17 | Snowflake CLI: improper input validation | High8.2 | 3.27.0+1 more |
| Sep 10 | Workload identity attestation generated before login host validation in Snowflake drivers | High8.2 | 3.3.0+6 more |
| Sep 10 | Improper OCSP response validation in Snowflake drivers | High7.4 | 3.3.0+3 more |
| Sep 10 | Snowflake JDBC Driver auto-configuration account validation permits credential redirection | Medium5.3 | 4.3.4+2 more |
| Aug 12 | Snowflake Python APIs: privilege escalation | High8.1 | 1.13.0 |
| Jul 24 | Snowflake ODBC Driver: remote code execution | High8.8 | Snowflake libsnowflakeclient 2.9.2+2 more |