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.
SeverityMedium
CVSS6.5
Exploit probability—
Product
Grafana Tempo
PublishedJun 19, 2026
First seenJun 19, 2026
Weakness typeCWE-400Uncontrolled resource consumption
How to fix
Update
- grafana tempo2.8.4, 2.9.2, 2.10.2 or later
- github.com/grafana/tempo1.5.1-0.20260303204923-b13f74291d48 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| grafana tempo | 2.6.0 ≤ v < 2.8.4, 2.9.0 ≤ v < 2.9.2, 2.10.0 ≤ v < 2.10.2 | 2.8.4, 2.9.2, 2.10.2 |
| github.com/grafana/tempoGo | v < 1.5.1-0.20260303204923-b13f74291d48 | 1.5.1-0.20260303204923-b13f74291d48 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.