CVE-2026-21728
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). Alternatively, automatically restart the service.
- CVSS 3.1
- 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS
- 0.6% chance of exploitation in the next 30 days; higher than 50% of CVEs (scores of 2026-10-26)
- CWEs
- CWE-400, CWE-770
- Published
- Modified
- Record from
- the NVD, synced
Affected
- grafana:tempo
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-p4r4-xvrq-gvmc | Go | github.com/grafana/tempo | >=1.3.0 <2.8.4 | 2.8.4 |
| GHSA-p4r4-xvrq-gvmc | Go | github.com/grafana/tempo | >=2.9.0 <2.9.2 | 2.9.2 |
| GHSA-p4r4-xvrq-gvmc | Go | github.com/grafana/tempo | >=2.10.0 <2.10.2 | 2.10.2 |
| GO-2026-5528 | Go | github.com/grafana/tempo | >=1.3.0 | no fix published |