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 service against the Tempo service.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.004 (32.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 32.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Grafana Enterprise Traces (Get) — versions 2.6.1
- Grafana Tempo — versions 2.6.0
Weakness classification (CWE)
References
- grafana.com/security/security-advisories/cve-2026-27878 (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.