Medium 6.5Published May 13, 2026

CVE-2026-33378Grafana Data Source Plugin: DoS (OOM) via Negative Interval Injection in $__timeGroup Macro

Updated under an hour ago (Oct 26, 2026, 7:40 PM ET)

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It affects Grafana OSS and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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: 6.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-400
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GRAFANA
NVD analysis: Analyzed
Record last updated: Aug 27, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Grafana Grafana OSS grafana:oss (from the name)	from 8.0.0 through 11.6.14; from 11.6.14 before 11.6.14+security-04; from 12.0.0 through 12.2.8; from 12.2.8 before 12.2.8+security-04; from 12.3.0 through 12.3.6; from 12.3.6 before 12.3.6+security-04; from 12.4.0 through 12.4.3; from 12.4.3 before 12.4.3+security-02; and 2 more ranges	CNA record
grafana grafana grafana: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; 12.2.8; 12.2.8; and 5 more ranges	NVD

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.