Tempo query limit results in unbounded memory allocation

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Summary

CVECVE-2026-21728
StatePUBLISHED
AssignerGRAFANA
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-24 09:16:03 UTC
Updated2026-07-23 12:17:11 UTC
DescriptionTempo 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.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from ADP

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.000130000 probability, percentile 0.020990000 (date 2026-04-26)

Problem Types: CWE-400 | CWE-770 | CWE-400 CWE-400 Uncontrolled Resource Consumption | CWE-770 Allocation of Resources Without Limits or Throttling

VersionSourceTypeScoreSeverityVector
3.1ADPCVSS7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1[email protected]Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.10b0ca135-0b70-47e7-9f44-1890c2a1c46cSecondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Grafana Tempo All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Grafana Tempo affected 1.3.0 2.8.3 semver Not specified
CNA Grafana Tempo affected 2.9.0 2.9.1 semver Not specified
CNA Grafana Tempo affected 2.10.0 2.10.1 semver Not specified
CNA Grafana Enterprise Traces GET affected 1.0.0 2.8.7 semver Not specified
ADP Red Hat Multicluster Global Hub 1.3.4 unaffected 1779212259 * rpm Not specified
ADP Red Hat Multicluster Global Hub 1.4.5 unaffected 1779579439 * rpm Not specified
ADP Red Hat Multicluster Global Hub 1.5.6 unaffected 1778867753 * rpm Not specified
ADP Red Hat Multicluster Global Hub 1.6.2 unaffected 1780167118 * rpm Not specified
ADP Red Hat Multicluster Global Hub 1.7.0 unaffected 1779925273 * rpm Not specified
ADP Red Hat Logging Subsystem For Red Hat OpenShift Not specified Not specified
ADP Red Hat Multicluster Global Hub Not specified Not specified
ADP Red Hat Red Hat Advanced Cluster Management For Kubernetes 2 Not specified Not specified
ADP Red Hat Red Hat Ceph Storage 5 Not specified Not specified
ADP Red Hat Red Hat Ceph Storage 6 Not specified Not specified
ADP Red Hat Red Hat Ceph Storage 9 Not specified Not specified
ADP Red Hat Red Hat Enterprise Linux 10 Not specified Not specified
ADP Red Hat Red Hat Enterprise Linux 9 Not specified Not specified
ADP Red Hat Red Hat OpenShift Distributed Tracing 3 Not specified Not specified
ADP Red Hat Red Hat OpenShift Distributed Tracing 3 Not specified Not specified
ADP Red Hat Red Hat OpenShift Distributed Tracing 3 Not specified Not specified
ADP Red Hat Red Hat OpenShift Distributed Tracing 3 Not specified Not specified

References

ReferenceSourceLinkTags
access.redhat.com/errata/RHSA-2026:24503 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/security/cve/CVE-2026-21728 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:21769 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-21728.json 0b0ca135-0b70-47e7-9f44-1890c2a1c46c security.access.redhat.com
access.redhat.com/errata/RHSA-2026:23345 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
bugzilla.redhat.com/show_bug.cgi 0b0ca135-0b70-47e7-9f44-1890c2a1c46c bugzilla.redhat.com
access.redhat.com/errata/RHSA-2026:22347 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
grafana.com/security/security-advisories/cve-2026-21728 [email protected] grafana.com Broken Link
access.redhat.com/errata/RHSA-2026:22423 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

SourceTimeEvent
ADP2026-04-24T09:00:58.144ZReported to Red Hat.
ADP2026-04-24T08:00:47.074ZMade public.

Solutions

ADP: RHSA-2026:22423: Multicluster Global Hub 1.3.4

ADP: RHSA-2026:22347: Multicluster Global Hub 1.4.5

ADP: RHSA-2026:21769: Multicluster Global Hub 1.5.6

ADP: RHSA-2026:23345: Multicluster Global Hub 1.6.2

ADP: RHSA-2026:24503: Multicluster Global Hub 1.7.0

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