Medium severity · published Sep 2, 2026
CVE-2026-19475
SQL Data Source Plugin: OOM DoS via $__timeGroup macro
6.5
CVSS
0.4%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 36% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GR
Grafana · Grafana
11.6.0 through 11.6.16; 12.0.0 through 12.0.10; 12.1.0 through 12.1.10; 12.2.0 through 12.2.10; 12.3.0 through 12.3.11; 12.4.0 through 12.4.9; +2 more · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-19475
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-19475
grafana.com
https://grafana.com/security/security-advisories/cve-2026-19475
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