# CVE-2026-86600: Workload identity attestation generated before login host validation in Snowflake drivers

> CVE-2026-86600: Workload identity attestation generated before login host validation in Snowflake drivers. CVSS 8.2 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-86600
Last updated: 2026-09-10T16:18:03Z

- Published: 2026-09-08 15:48 UTC · Updated: 2026-09-10 16:18 UTC · Assigner: SNOWFLAKE
- CVSS: 8.2 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
- EPSS: 0.51%, 43th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-441, CWE-522

## Description

In affected Snowflake drivers, WORKLOAD\_IDENTITY authentication requests a cloud workload-identity token and attaches it to the login request without verifying that the configured host is a Snowflake endpoint. An attacker who can modify the connection configuration can cause the driver to mint a fresh attestation and send it to a host they control. The captured token can be replayed to Snowflake for its remaining lifetime in accounts where that workload identity is already registered. On Azure, the token audience is also taken from connection configuration. Combined with an attacker-controlled host, the driver can request a Managed Identity access token scoped to a non-Snowflake Azure resource and deliver it to the attacker. That path is the only case in which impact extends beyond Snowflake; it is bounded by the token lifetime and the managed identity’s permissions. Successful exploitation requires WORKLOAD\_IDENTITY authentication on a workload that already has an ambient cloud identity. Patched driver versions restrict this authenticator to recognized Snowflake hosts. Users must manually upgrade.

## Affected vendors and products

- Snowflake: Snowflake Connector for .NET
- Snowflake: Snowflake Connector for Python
- Snowflake: Snowflake Go Driver
- Snowflake: Snowflake JDBC Driver
- Snowflake: Snowflake JDBC Driver (FIPS)
- Snowflake: Snowflake JDBC Driver (Thin)
- Snowflake: Snowflake Libsnowflakeclient
- Snowflake: Snowflake Node.js Driver
- 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-2026-86600)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-86600)
- [https://docs.snowflake.com/en/release-notes/clients-drivers/dotnet-2026\#version-610-september-3-2026](https://docs.snowflake.com/en/release-notes/clients-drivers/dotnet-2026#version-610-september-3-2026)
- [https://docs.snowflake.com/en/release-notes/clients-drivers/golang-2026\#version-220-sep-03-2026](https://docs.snowflake.com/en/release-notes/clients-drivers/golang-2026#version-220-sep-03-2026)
- [https://docs.snowflake.com/en/release-notes/clients-drivers/jdbc-2026\#version-434-sep-03-2026](https://docs.snowflake.com/en/release-notes/clients-drivers/jdbc-2026#version-434-sep-03-2026)
- [https://docs.snowflake.com/en/release-notes/clients-drivers/nodejs-2026\#version-330-september-3-2026](https://docs.snowflake.com/en/release-notes/clients-drivers/nodejs-2026#version-330-september-3-2026)
- [https://docs.snowflake.com/en/release-notes/clients-drivers/odbc-2026\#version-3200-sep-3-2026](https://docs.snowflake.com/en/release-notes/clients-drivers/odbc-2026#version-3200-sep-3-2026)
- [https://docs.snowflake.com/en/release-notes/clients-drivers/php-pdo-2026\#version-420-sep-3-2026](https://docs.snowflake.com/en/release-notes/clients-drivers/php-pdo-2026#version-420-sep-3-2026)
- [https://github.com/snowflakedb/libsnowflakeclient/releases/tag/v2.10.0](https://github.com/snowflakedb/libsnowflakeclient/releases/tag/v2.10.0)
- [https://github.com/snowflakedb/snowflake-connector-python/releases/tag/v4.7.3](https://github.com/snowflakedb/snowflake-connector-python/releases/tag/v4.7.3)

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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-2026-86600 · Markdown: https://rewindex.com/cve/CVE-2026-86600.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-86600 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:13:28.658Z