grafana/tempo · Security
Grafana Tempo has an Uncontrolled Resource Consumption issue
- GHSA ID
- GHSA-p4r4-xvrq-gvmc
- CVE ID
- CVE-2026-21728
- Severity
- high
- Published
- Updated
- CVSS
- 7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS v3
- 7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Description
Tempo queries with large limits can cause large memory allocations which can impact the availability of the service, depending on its deployment strategy.
Mitigation can be done by setting max_result_limit in the search config, e.g. to 262144 (2^18).
CWEs
- CWE-400 · Uncontrolled Resource Consumption
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-21728 ↗
- https://grafana.com/security/security-advisories/cve-2026-21728 ↗
- https://github.com/grafana/tempo/pull/6525 ↗
- https://github.com/grafana/tempo/commit/650eb1985a0776789c8564122990f588a742356f ↗
- https://github.com/grafana/tempo/blob/4dc3e5b0d3463a0b67498b662b85a148698b4afd/docs/sources/tempo/release-notes/version-2/v2-10.md?plain=1#L328 ↗
- https://github.com/grafana/tempo/blob/4dc3e5b0d3463a0b67498b662b85a148698b4afd/docs/sources/tempo/release-notes/version-2/v2-8.md?plain=1#L251 ↗
- https://github.com/grafana/tempo/blob/4dc3e5b0d3463a0b67498b662b85a148698b4afd/docs/sources/tempo/release-notes/version-2/v2-9.md?plain=1#L224 ↗
- https://github.com/advisories/GHSA-p4r4-xvrq-gvmc ↗