cve.bz

CVE-2026-27878

6.5 mediumEPSS 0.4%

Medium (6.5) in grafana tempo. EPSS 0.4% chance of exploitation in the next 30 days. Fixed in github.com/grafana/tempo 1.5.1-0.20260303204923-b13f74291d48.

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.

Severity

CVSS 3.1

6.5 medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS
0.4% chance of exploitation in the next 30 days; higher than 35% of CVEs (scores of 2026-10-31)
CWE
CWE-400
Published
Modified
Record from
the NVD, synced

Affected

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-6xff-cpcq-vpw2Gogithub.com/grafana/tempo<1.5.1-0.20260303204923-b13f74291d481.5.1-0.20260303204923-b13f74291d48
GO-2026-6325Gogithub.com/grafana/tempo<1.5.1-0.20260303204923-b13f74291d481.5.1-0.20260303204923-b13f74291d48

References

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