Answer in brief
CVE-2026-33378 records a Unknown severity 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). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. 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). Check affected ranges and fixed versions before updating.
| 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 |
Published upstream
May 13, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 11, 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.
Answer in brief
CVE-2026-33378 records a Unknown severity 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). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. 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). Check affected ranges and fixed versions before updating.
| 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 |
Published upstream
May 13, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 11, 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.