CVE-2026-27878

MEDIUM CVSS 6.5 View on NVD ↗

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References

https://grafana.com/security/security-advisories/cve-2026-27878

Published: Jun 19, 2026 19:16 UTC Modified: Jun 19, 2026 19:16 UTC