Vulnerability · Published May 13, 2026 · Assigned by GRAFANA
CVE-2026-33378Grafana Data Source Plugin: DoS (OOM) via Negative Interval Injection in $__timeGroup Macro
Medium 6.5
In plain English
A medium-severity uncontrolled resource consumption in Grafana OSS from Grafana. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 26% of all known vulnerabilities).
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.3%top 73.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Grafana | Grafana OSS | 8.0.0 – through 11.6.1411.6.14 – before 11.6.14+security-0412.0.0 – through 12.2.812.2.8 – before 12.2.8+security-0412.3.0 – through 12.3.612.3.6 – before 12.3.6+security-0412.4.0 – through 12.4.312.4.3 – before 12.4.3+security-02 |
Weakness: CWE-400 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
References
- https://grafana.com/security/security-advisories/cve-2026-33378 vendor-advisory