Snowflake JDBC Driver auto-configuration account validation permits credential redirection (CVE-2026-85528) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-85528

Snowflake JDBC Driver auto-configuration account validation permits credential redirection

Answer in brief

CVE-2026-85528 records a Unknown severity vulnerability in Snowflake JDBC Driver auto-configuration account validation permits credential redirection. The current sources do not mark it as known exploited. The current feed maps Snowflake/Snowflake JDBC Driver (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 4, 2026Updated Sep 4, 2026Source checked Sep 4, 2026First seen by HOL Sep 4, 2026Material review Sep 4, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Snowflake/Snowflake JDBC Driver (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Snowflake/Snowflake JDBC Drivergeneric	>=4.2.0 <4.3.4	4.3.4

Recommended response

Check inventory. Check lockfiles and deployed manifests for Snowflake/Snowflake JDBC Driver.
Review the reported fix. Update Snowflake/Snowflake JDBC Driver to 4.3.4 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 4, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 4, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 4, 2026

Sources and claim methodology

Source referencedocs.snowflake.com

Upstream source description

Improper input validation of the auto-configuration account identifier in Snowflake JDBC Driver versions 4.2.0 through 4.3.3 allowed a credential-bearing login request to be redirected to an attacker-selected HTTPS endpoint. An attacker able to control the account value could cause the driver to transmit a reusable login credential to a host of their choosing and replay it to obtain the privileges granted to that credential. Successful exploitation requires an application using jdbc:snowflake:auto with a connections.toml section that omits an explicit host and a lower-trust principal able to set the account value; ordinary JDBC URLs are unaffected. The fix is available in Snowflake JDBC Driver version 4.3.4. Users must manually upgrade.

Quoted source text, attributed separately from HOL analysis.