High 7.5Published Apr 24, 2026

CVE-2026-21728Tempo query limit results in unbounded memory allocation

Updated under an hour ago (Oct 28, 2026, 4:30 AM ET)

Does this affect you?

It affects Grafana Tempo and 7 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Grafana Tempo

Exploited in the last 30 days

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 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-400, CWE-770
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GRAFANA
NVD analysis: Modified
Record last updated: Sep 9, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Grafana Tempo grafana:tempo (from the name)	from 1.3.0 through 2.8.3; from 2.9.0 through 2.9.1; from 2.10.0 through 2.10.1	CNA record
Grafana Enterprise Traces (GET) grafana:enterprise_traces_get (from the name)	from 1.0.0 through 2.8.7	CNA record
Red Hat Multicluster Global Hub 1.3.4 redhat:multicluster_globalhub	from 1779212259 not affected	CISA ADP
Red Hat Logging Subsystem for Red Hat OpenShift redhat:logging	6	CISA ADP
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2 redhat:acm	2	CISA ADP
Red Hat Red Hat Ceph Storage 5 redhat:ceph_storage	5	CISA ADP
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux	10	CISA ADP
Red Hat Red Hat OpenShift distributed tracing 3 redhat:openshift_distributed_tracing	3	CISA ADP
grafana tempo grafana:tempo	from 1.3.0 before 2.8.4; from 2.9.0 before 2.9.2; from 2.10.0 before 2.10.2	NVD

References

References

https://grafana.com/security/security-advisories/cve-2026-21728	vendor-advisory, broken-link
https://access.redhat.com/errata/RHSA-2026:21769
https://access.redhat.com/errata/RHSA-2026:22347
https://access.redhat.com/errata/RHSA-2026:22423
https://access.redhat.com/errata/RHSA-2026:23345
https://access.redhat.com/errata/RHSA-2026:24503
https://access.redhat.com/security/cve/CVE-2026-21728
https://bugzilla.redhat.com/show_bug.cgi?id=2461395
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-21728.json

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.