Answer in brief
CVE-2026-33378 records a Medium severity (CVSS 6.5) vulnerability in Grafana Data Source Plugin: DoS (OOM) via Negative Interval Injection in $__timeGroup Macro. The current sources do not mark it as known exploited. The current feed maps Grafana/Grafana OSS (generic), Grafana/Grafana OSS (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 6.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Grafana/Grafana OSS (generic), Grafana/Grafana OSS (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:a:grafana:grafana:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:grafana:grafana:11.6.14:-:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:grafana:grafana:11.6.14:security01:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:grafana:grafana:12.2.8:-:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:grafana:grafana:12.2.8:security01:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:grafana:grafana:12.3.6:-:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:grafana:grafana:12.3.6:security01:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:grafana:grafana:12.4.3:-:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:grafana:grafana:13.0.0:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:grafana:grafana:13.0.1:-:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Grafana/Grafana OSSgeneric | 8.0.0 || >=11.6.14 <11.6.14+security-04 || 12.0.0 || >=12.2.8 <12.2.8+security-04 || 12.3.0 || >=12.3.6 <12.3.6+security-04 || 12.4.0 || >=12.4.3 <12.4.3+security-02 || 13.0.0 || >=13.0.1 <13.0.1+security-01 | 11.6.14+security-04, 12.2.8+security-04, 12.3.6+security-04, 12.4.3+security-02, 13.0.1+security-01 |
| Grafana/Grafana OSSgeneric | >=8.0.0 <=11.6.14 || >=11.6.14 <11.6.14+security-04 || >=12.0.0 <=12.2.8 || >=12.2.8 <12.2.8+security-04 || >=12.3.0 <=12.3.6 || >=12.3.6 <12.3.6+security-04 || >=12.4.0 <=12.4.3 || >=12.4.3 <12.4.3+security-02 || >=13.0.0 <=13.0.1 || >=13.0.1 <13.0.1+security-01 | 11.6.14+security-04, 12.2.8+security-04, 12.3.6+security-04, 12.4.3+security-02, 13.0.1+security-01 |
Published upstream
May 13, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 26, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 11, 2026
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.
Quoted source text, attributed separately from HOL analysis.