What is CVE-2026-27878?

CVE-2026-27878 is a medium-severity vulnerability in Grafana Enterprise Traces (Get), classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2026-06-19.

How severe is CVE-2026-27878?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Resource exhaustion in Grafana Enterprise Traces (Get)

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 s…

Vulnerability class: DoS (Denial of Service)

EPSS: 0.004 (33.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Grafana Enterprise Traces (Get) — versions 2.6.1
Grafana Tempo — versions 2.6.0

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

security@grafana.com (vendor-advisory, Broken Link)

Frequently asked questions

What is CVE-2026-27878?: CVE-2026-27878 is a medium-severity vulnerability in Grafana Enterprise Traces (Get), classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2026-06-19.
How severe is CVE-2026-27878?: Medium severity. CVSS v3 base score is 6.5 out of 10.