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 2.6.1 involves a TraceQL query that includes a large exemplars hint value. When processed, the Tempo instance allocates an excessive amount of memory, which can cause the service to crash due to out-of-memory conditions. The issue requires authenticated user access and results in denial of service (DoS) without impacting confidentiality or integrity.
Potential Impact
An authenticated user can exploit this vulnerability to cause the Grafana Tempo service to crash by triggering an out-of-memory condition. This results in denial of service, potentially disrupting monitoring and tracing capabilities dependent on Tempo. There is no impact on confidentiality or integrity.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround has been documented at this time. Monitoring for vendor updates and restricting authenticated user permissions to trusted individuals is advised until a patch is available.
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
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Grafana Tempo 2.6.1 involves a TraceQL query that includes a large exemplars hint value. When processed, the Tempo instance allocates an excessive amount of memory, which can cause the service to crash due to out-of-memory conditions. The issue requires authenticated user access and results in denial of service (DoS) without impacting confidentiality or integrity.
Potential Impact
An authenticated user can exploit this vulnerability to cause the Grafana Tempo service to crash by triggering an out-of-memory condition. This results in denial of service, potentially disrupting monitoring and tracing capabilities dependent on Tempo. There is no impact on confidentiality or integrity.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround has been documented at this time. Monitoring for vendor updates and restricting authenticated user permissions to trusted individuals is advised until a patch is available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GRAFANA
- Date Reserved
- 2026-02-24T14:30:17.726Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a35966af198dc38c1138313
Added to database: 06/19/2026, 19:20:10 UTC
Last enriched: 07/30/2026, 21:53:27 UTC
Last updated: 08/03/2026, 07:17:56 UTC
Views: 62
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