HIGH 7.5 Go
Grafana Tempo has an Uncontrolled Resource Consumption issue
GHSA-p4r4-xvrq-gvmc · CVE-2026-21728 · GO-2026-5528
Published · Modified
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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).
References
- ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2026-21728
- WEB https://github.com/grafana/tempo/pull/6525
- WEB https://github.com/grafana/tempo/commit/650eb1985a0776789c8564122990f588a742356f
- PACKAGE https://github.com/grafana/tempo
- WEB https://github.com/grafana/tempo/blob/4dc3e5b0d3463a0b67498b662b85a148698b4afd/docs/sources/tempo/release-notes/version-2/v2-10.md?plain=1#L328
- WEB https://github.com/grafana/tempo/blob/4dc3e5b0d3463a0b67498b662b85a148698b4afd/docs/sources/tempo/release-notes/version-2/v2-8.md?plain=1#L251
- WEB https://github.com/grafana/tempo/blob/4dc3e5b0d3463a0b67498b662b85a148698b4afd/docs/sources/tempo/release-notes/version-2/v2-9.md?plain=1#L224
- WEB https://grafana.com/security/security-advisories/cve-2026-21728
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