CVE-2026-27878: Vulnerability in Grafana Enterprise Traces (GET)
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.
AI Analysis
Technical Summary
This vulnerability in Grafana Tempo's TraceQL query processing allows an authenticated user to supply a large exemplars hint value, which causes the Tempo instance to allocate excessive memory. This memory exhaustion results in an out-of-memory crash, effectively causing a denial of service condition. The issue is identified as CWE-400 (Uncontrolled Resource Consumption). The CVSS 3.1 base score is 6.5, reflecting a network attack vector with low complexity, requiring privileges but no user interaction, and causing availability impact only.
Potential Impact
An authenticated user can trigger a denial of service by causing the Tempo service to crash due to excessive memory allocation. There is no impact on confidentiality or integrity reported. The service downtime could affect monitoring and tracing capabilities relying on Grafana Tempo.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround is currently documented. Until a patch is available, restrict access to authenticated users and monitor for abnormal query patterns that might trigger excessive memory use.
CVE-2026-27878: Vulnerability in Grafana Enterprise Traces (GET)
Description
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.
CVSS v3.1
Score 6.5medium
Affected software
Grafana
Enterprise Traces (GET)
Grafana
Tempo
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Grafana Tempo's TraceQL query processing allows an authenticated user to supply a large exemplars hint value, which causes the Tempo instance to allocate excessive memory. This memory exhaustion results in an out-of-memory crash, effectively causing a denial of service condition. The issue is identified as CWE-400 (Uncontrolled Resource Consumption). The CVSS 3.1 base score is 6.5, reflecting a network attack vector with low complexity, requiring privileges but no user interaction, and causing availability impact only.
Potential Impact
An authenticated user can trigger a denial of service by causing the Tempo service to crash due to excessive memory allocation. There is no impact on confidentiality or integrity reported. The service downtime could affect monitoring and tracing capabilities relying on Grafana Tempo.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround is currently documented. Until a patch is available, restrict access to authenticated users and monitor for abnormal query patterns that might trigger excessive memory use.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GRAFANA
- Date Reserved
- 2026-02-24T14:30:17.726Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a35966af198dc38c1138313
Added to database: 06/19/2026, 19:20:10 UTC
Last enriched: 08/11/2026, 13:35:45 UTC
Last updated: 09/16/2026, 10:01:31 UTC
Views: 115
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