CVE-2026-33378

Description

Using the $__timeGroup macro, one can achieve an OOM by overloading the server. This requires a SQL datasource. If the server is set up to auto-restart, the impact is minimal or non-existent, as the attack can take upwards of half an hour to crash the server.

CVSS Vector

References

• https://grafana.com/security/security-advisories/cve-2026-33378