Grafana Tempo vulnerable to an out-of-memory crash
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.
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-27878US | — | — | ||
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… | ||||
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references
External citations — patches, advisories, analysis.
- https://github.com/grafana/tempoPACKAGE
- https://github.com/grafana/tempo/commit/3d7c78d438890991df594c20ae2031f8934aba3bWEB
- https://github.com/grafana/tempo/commit/b13f74291d489672601a10297f8fbcbf7dd19192WEB
- https://github.com/grafana/tempo/commit/b481ae9693f99785691197915066e6306950fa09WEB
- https://github.com/grafana/tempo/commit/e2d51b786aff94de3319c07994c6a5539b121eb5WEB
- https://github.com/grafana/tempo/pull/6559WEB
- https://github.com/grafana/tempo/pull/6646WEB
- https://github.com/grafana/tempo/pull/6792WEB
scry
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