CVE-2026-28381 Grafana CVE debrief

Who should care

Defenders of Grafana instances that utilize the Snowflake data source should be aware of this vulnerability. Given the critical severity and potential for data compromise, immediate attention is necessary for environments where unauthorized access or data manipulation could have significant impacts. This includes teams responsible for data security, compliance, and Grafana instance management.

Technical summary

The Snowflake data source in Grafana allows for GET/PUT commands, which can be exploited by any user with access to run queries against the data source. This enables reading and writing of files between the local Grafana server and the connected Snowflake host. The CVSS:3.1 vector is AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N, indicating a high impact due to the potential for unauthorized data access and modification.

Defensive priority

High priority due to potential for data compromise and high CVSS score

Recommended defensive actions

• Inventory Grafana instances and identify those using the Snowflake data source
• Review official Grafana security advisories for CVE-2026-28381
• Apply patches or updates provided by Grafana to mitigate the vulnerability
• Limit access to the Snowflake data source to only necessary users
• Monitor for suspicious activity related to the Snowflake data source

Evidence notes

The primary evidence for this vulnerability comes from the CVE record and the NVD detail page. The CVE-2026-28381 record indicates a critical vulnerability in the Grafana Snowflake data source. Evidence limits suggest that details about specific exploitation or additional impact are not provided beyond the CVE and NVD entries. Affected products include Grafana instances utilizing the Snowflake data source; defenders should verify their configurations against official advisories.

Official resources