Resource exhaustion in Grafana Oss
CVE-2026-19475
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.
Vulnerability class: DoS (Denial of Service)
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Affected products
Weakness classification (CWE)
References
- security@grafana.com (vendor-advisory)
Frequently asked questions
- What is CVE-2026-19475?
- CVE-2026-19475 is a medium-severity vulnerability in Grafana Oss, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2026-09-02.
- How severe is CVE-2026-19475?
- Medium severity. CVSS v3 base score is 6.5 out of 10.