CVE-2026-19475: Vulnerability in Grafana PostgreSQL Datasource
Description
An authenticated user with permission to query a SQL data source can bypass the fix for CVE-2026-33375 by injecting the timeGroup macro through a WHERE clause, which Grafana's regex-based macro parsing does not reject. Evaluating the injected macro causes uncontrolled memory consumption that can terminate the Grafana server process, resulting in a denial of service. The Microsoft SQL Server, PostgreSQL, and MySQL data sources are affected.
CVSS v3.1
Score 6.5medium
Affected software
Grafana
PostgreSQL Datasource
Grafana
MySQL Datasource
Grafana
Grafana OSS
Grafana
Microsoft SQL Server Datasource
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability allows an authenticated user with permission to query SQL data sources in Grafana to bypass the fix for CVE-2026-33375 by injecting the timeGroup macro through a WHERE clause. Grafana's regex-based macro parsing does not reject this injection, and evaluating the injected macro causes uncontrolled memory consumption. This can terminate the Grafana server process, leading to a denial of service. The affected data sources include Microsoft SQL Server, PostgreSQL, and MySQL. The vulnerability is identified as CWE-400 (Uncontrolled Resource Consumption).
Potential Impact
An attacker with authenticated query permissions can cause a denial of service by triggering uncontrolled memory consumption in the Grafana server process. This results in the termination of the Grafana server, disrupting service availability. There is no impact on confidentiality or integrity reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided at this time. Until a fix is available, restrict query permissions to trusted users and monitor for unusual resource consumption patterns related to SQL datasource queries.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GRAFANA
- Date Reserved
- 2026-08-10T14:51:01.083Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a9849d8acd9273b4970aff4
Added to database: 09/02/2026, 16:07:52 UTC
Last enriched: 09/07/2026, 13:19:04 UTC
Last updated: 10/17/2026, 18:48:17 UTC
Views: 105
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