CVE-2026-27878

EUVD-2026-38066
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.5 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 33%
Affected Products (NVD)
VendorProductVersion
grafanatempo
2.6.0 ≤
𝑥
< 2.8.4
grafanatempo
2.9.0 ≤
𝑥
< 2.9.2
grafanatempo
2.10.0 ≤
𝑥
< 2.10.2
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://grafana.com/security/security-advisories/cve-2026-27878