CVE-2026-27878

MEDIUM EPSS 14.2%

Published Jun 19, 20262w ago · Modified Jun 23, 20261w ago

6.5 CVSS 3.1

Medium

Published Jun 19, 2026 2w ago

Last Modified Jun 23, 2026 1w ago

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 Details

Base Score

6.5

Exploitability

2.8

Impact

3.6

Vector string

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector Network

Attack Complexity Low

Privileges Required Low

User Interaction None

Scope Unchanged

Confidentiality None

Integrity None

Availability High

Threat Intelligence

EPSS Exploit Probability

14.2% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-400 Uncontrolled Resource Consumption Resource Mgmt

References 1

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

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.