Workload identity attestation generated before login host validation in Snowflake drivers

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-86600
StatePUBLISHED
AssignerSNOWFLAKE
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-08 16:18:29 UTC
Updated2026-09-10 16:18:03 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 8.2 HIGH from 412d305a-227d-44f9-a262-a31ba44f2aea

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N

EPSS: 0.003090000 probability, percentile 0.234440000 (date 2026-09-10)

Problem Types: CWE-441 | CWE-522 | CWE-522 Insufficiently Protected Credentials | CWE-441 Unintended Proxy or Intermediary ('Confused Deputy')

VersionSourceTypeScoreSeverityVector
3.1412d305a-227d-44f9-a262-a31ba44f2aeaSecondary8.2HIGHCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
3.1CNACVSS8.2HIGHCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Snowflake Snowflake Connector For Python affected 3.14.1 4.7.3 python Not specified
CNA Snowflake Snowflake Go Driver affected 1.15.0 1.19.1 semver Not specified
CNA Snowflake Snowflake Go Driver affected 2.0.0 2.2.0 semver Not specified
CNA Snowflake Snowflake JDBC Driver affected 3.24.0 4.3.4 maven Not specified
CNA Snowflake Snowflake JDBC Driver FIPS affected 3.24.0 4.3.4 maven Not specified
CNA Snowflake Snowflake JDBC Driver Thin affected 3.24.0 4.3.4 maven Not specified
CNA Snowflake Snowflake Node.js Driver affected 2.1.1 3.3.0 semver Not specified
CNA Snowflake Snowflake Connector For .NET affected 4.7.0 6.1.0 semver Not specified
CNA Snowflake Snowflake ODBC Driver affected 3.9.0 3.20.0 semver Not specified
CNA Snowflake Snowflake PHP PDO Driver affected 3.6.0 4.2.0 semver Not specified
CNA Snowflake Snowflake Libsnowflakeclient affected 2.2.0 2.10.0 semver Not specified

References

ReferenceSourceLinkTags
docs.snowflake.com/en/release-notes/clients-drivers/golang-2026 412d305a-227d-44f9-a262-a31ba44f2aea docs.snowflake.com
docs.snowflake.com/en/release-notes/clients-drivers/jdbc-2026 412d305a-227d-44f9-a262-a31ba44f2aea docs.snowflake.com
docs.snowflake.com/en/release-notes/clients-drivers/php-pdo-2026 412d305a-227d-44f9-a262-a31ba44f2aea docs.snowflake.com
github.com/snowflakedb/libsnowflakeclient/releases/tag/v2.10.0 412d305a-227d-44f9-a262-a31ba44f2aea github.com
docs.snowflake.com/en/release-notes/clients-drivers/nodejs-2026 412d305a-227d-44f9-a262-a31ba44f2aea docs.snowflake.com
github.com/snowflakedb/snowflake-connector-python/releases/tag/v4.7.3 412d305a-227d-44f9-a262-a31ba44f2aea github.com
docs.snowflake.com/en/release-notes/clients-drivers/odbc-2026 412d305a-227d-44f9-a262-a31ba44f2aea docs.snowflake.com
docs.snowflake.com/en/release-notes/clients-drivers/dotnet-2026 412d305a-227d-44f9-a262-a31ba44f2aea docs.snowflake.com
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