SQL Data Source Plugin: OOM DoS via $__timeGroup macro (CVE-2026-19475) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-19475

SQL Data Source Plugin: OOM DoS via $__timeGroup macro

Answer in brief

CVE-2026-19475 records a Unknown severity vulnerability in SQL Data Source Plugin: OOM DoS via $__timeGroup macro. The current sources do not mark it as known exploited. The current feed maps Grafana/Grafana OSS (generic), Grafana/Microsoft SQL Server Datasource (generic), Grafana/MySQL Datasource (generic), Grafana/PostgreSQL Datasource (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 2, 2026Updated Sep 3, 2026Source checked Sep 3, 2026First seen by HOL Sep 2, 2026Material review Sep 3, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 4 mapped packages or products
Fix availability: Not reported

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 Grafana/Grafana OSS (generic), Grafana/Microsoft SQL Server Datasource (generic), Grafana/MySQL Datasource (generic), Grafana/PostgreSQL Datasource (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Grafana/Grafana OSSgeneric	11.6.0 \|\| 12.0.0 \|\| 12.1.0 \|\| 12.2.0 \|\| 12.3.0 \|\| 12.4.0 \|\| 13.0.0 \|\| 13.1.0	Not reported
Grafana/Microsoft SQL Server Datasourcegeneric	13.0.0	Not reported
Grafana/MySQL Datasourcegeneric	13.0.0	Not reported
Grafana/PostgreSQL Datasourcegeneric	13.0.0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Grafana/Grafana OSS, Grafana/Microsoft SQL Server Datasource, Grafana/MySQL Datasource.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Sep 2, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 3, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 2, 2026

Sources and claim methodology

Source referencegrafana.com

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.