Review reviewHigh

CVE-2026-21728

Grafana Tempo, Enterprise Traces (GET), Multicluster Global Hub 1.3.4

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
7.5
EPSS
0.64%
47.0% percentile
CISA KEV
Not listed
Published
2026.04.24
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.64%
Technical severityCVSS 7.5

Vulnerability overview

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.

Affected product and versions

Product
Grafana Tempo, Enterprise Traces (GET), Multicluster Global Hub 1.3.4
Affected versions
>= 1.3.0 <= 2.8.3, >= 2.9.0 <= 2.9.1, >= 2.10.0 <= 2.10.1, >= 1.0.0 <= 2.8.7, >= 1.3.0 < 2.8.4, >= 2.9.0 < 2.9.2, >= 2.10.0 < 2.10.2
Fixed versions
2.8.4, 2.9.2, 2.10.2

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Grafana Tempo, Enterprise Traces (GET), Multicluster Global Hub 1.3.4 and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
CWE-400, CWE-770