Input validation error in Grafana - CVE-2026-33378
Published: May 18, 2026
Vulnerability identifier: #VU131639
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-33378
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Grafana Labs
Affected software:
Grafana
Grafana
Detailed vulnerability description
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to improper input validation in the $__timeGroup macro when processing user-supplied negative interval values in a SQL datasource query. A remote user can supply a specially crafted query parameter to cause a denial of service.
Exploitation requires the use of a SQL datasource.
How to mitigate CVE-2026-33378
Install security update from vendor's website.