CVE-2026-33378
MEDIUMGrafana Data Source Plugin: DoS (OOM) via Negative Interval Injection in $__timeGroup Macro
Title source: cnaDescription
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.
References (1)
Core 1
Core References
Vendor Advisory vendor-advisory
https://grafana.com/security/security-advisories/cve-2026-33378
Scores
CVSS v3
6.5
EPSS
0.0033
EPSS Percentile
24.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-400
Status
published
Products (17)
grafana/grafana
11.6.14 (2 CPE variants)
grafana/grafana
12.2.8 (2 CPE variants)
grafana/grafana
12.3.6 (2 CPE variants)
grafana/grafana
12.4.3
grafana/grafana
13.0.0
grafana/grafana
13.0.1
grafana/grafana
8.0.0 - 11.6.14
Grafana/Grafana OSS
11.6.14 - 11.6.14+security-04
Grafana/Grafana OSS
12.0.0 - 12.2.8
Grafana/Grafana OSS
12.2.8 - 12.2.8+security-04
... and 7 more
Published
May 13, 2026
Tracked Since
May 14, 2026