CVE-2026-27878

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 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://grafana.com/security/security-advisories/cve-2026-27878	Broken Link

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:grafana:tempo::::::::
	cpe:2.3:a:grafana:tempo::::::::
	cpe:2.3:a:grafana:tempo::::::::

History

No history.

Information

Published : 2026-06-19 19:16

Updated : 2026-06-29 19:59

NVD link : CVE-2026-27878

Mitre link : CVE-2026-27878

CVE.ORG link : CVE-2026-27878

JSON object : View

Products Affected

grafana

tempo

CWE

CWE-400

Uncontrolled Resource Consumption

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