Answer in brief
CVE-2026-27878 records a Medium severity (CVSS 6.5) vulnerability in Tempo TraceQL query with exemplar hint could result in unbounded memory usage. The current sources do not mark it as known exploited. The current feed maps Grafana/Enterprise Traces (GET) (generic), Grafana/Tempo (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/Enterprise Traces (GET) (generic), Grafana/Tempo (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Grafana/Enterprise Traces (GET)generic | >=2.6.1 <2.8.8 | 2.8.8 |
| Grafana/Tempogeneric | >=2.6.0 <2.10.2 | 2.10.2 |
Published upstream
Jun 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 29, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 19, 2026
A TraceQL query in Grafana Tempo with a large exemplars hint value can cause the Tempo instance to allocate an excessive amount of memory, resulting in an out-of-memory crash. This could allow an authenticated user to trigger a denial of service against the Tempo service.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-27878 records a Medium severity (CVSS 6.5) vulnerability in Tempo TraceQL query with exemplar hint could result in unbounded memory usage. The current sources do not mark it as known exploited. The current feed maps Grafana/Enterprise Traces (GET) (generic), Grafana/Tempo (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/Enterprise Traces (GET) (generic), Grafana/Tempo (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Grafana/Enterprise Traces (GET)generic | >=2.6.1 <2.8.8 | 2.8.8 |
| Grafana/Tempogeneric | >=2.6.0 <2.10.2 | 2.10.2 |
Published upstream
Jun 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 29, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 19, 2026
A TraceQL query in Grafana Tempo with a large exemplars hint value can cause the Tempo instance to allocate an excessive amount of memory, resulting in an out-of-memory crash. This could allow an authenticated user to trigger a denial of service against the Tempo service.
Quoted source text, attributed separately from HOL analysis.