Unrated severityNVD Advisory· Published Jun 19, 2026· Updated Jun 19, 2026
Tempo TraceQL query with exemplar hint could result in unbounded memory usage
CVE-2026-27878
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.
Affected products
1Patches
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
1- grafana.com/security/security-advisories/cve-2026-27878mitrevendor-advisory
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