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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.

PUBLISHED Reserved 2026-02-24 | Published 2026-06-19 | Updated 2026-06-19 | Assigner GRAFANA




MEDIUM: 6.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Product status

Default status
unaffected

2.6.1 (semver) before 2.8.8
affected

Default status
unaffected

2.6.0 (semver) before 2.10.2
affected

References

grafana.com/security/security-advisories/cve-2026-27878 vendor-advisory

cve.org (CVE-2026-27878)

nvd.nist.gov (CVE-2026-27878)

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