What’s Vulnerable › Vulnerabilities
CVE-2026-33378: Grafana Data Source Plugin: DoS (OOM) via Negative Interval Injection in $__timeGroup Macro
- Severity: medium (CVSS 6.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-05-13 · updated 2026-10-26
- Weakness: CWE-400
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
- Grafana: from 8.0.0 before 11.6.14; from 12.0.0 before 12.2.8; from 12.3.0 before 12.3.6; from 12.4.0 before 12.4.3; 11.6.14, 11.6.14-security01, 12.2.8, 12.2.8-security01, 12.3.6, 12.3.6-security01 (+3) — fixed in 11.6.14, 12.2.8, 12.3.6, 12.4.3
How to fix
Upgrade to a fixed version: Grafana 11.6.14, 12.2.8, 12.3.6, 12.4.3. Check the vendor advisory for mitigations.
References
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