CVE-2026-27878

medium

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.

References

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

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-38066

Details

Source: Mitre, NVD

Published: 2026-06-19

Updated: 2026-06-29

Named Vulnerability: GO-2026-6325Named Vulnerability: GHSA-6xff-cpcq-vpw2

Risk Information

CVSS v2

Base Score: 6.8

Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:N/A:C

Severity: Medium

CVSS v3

Base Score: 6.5

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

Severity: Medium

EPSS

EPSS: 0.00235