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 v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://grafana.com/security/security-advisories/cve-2026-21728	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

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:grafana:tempo::::::::
	cpe:2.3:a:grafana:tempo::::::::
	cpe:2.3:a:grafana:tempo::::::::

History

No history.

Information

Published : 2026-04-24 09:16

Updated : 2026-09-09 13:18

NVD link : CVE-2026-21728

Mitre link : CVE-2026-21728

CVE.ORG link : CVE-2026-21728

JSON object : View

Products Affected

grafana

tempo

CWE

CWE-400

Uncontrolled Resource Consumption

CWE-770

Allocation of Resources Without Limits or Throttling

{"id": "CVE-2026-21728", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-21728", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-04-24T11:29:58.649315Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security@grafana.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}, {"type": "Secondary", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security@grafana.com", "affectedData": [{"vendor": "Grafana", "product": "Tempo", "versions": [{"status": "affected", "version": "1.3.0", "versionType": "semver", "lessThanOrEqual": "2.8.3"}, {"status": "affected", "version": "2.9.0", "versionType": "semver", "lessThanOrEqual": "2.9.1"}, {"status": "affected", "version": "2.10.0", "versionType": "semver", "lessThanOrEqual": "2.10.1"}], "defaultStatus": "unaffected"}, {"vendor": "Grafana", "product": "Enterprise Traces (GET)", "versions": [{"status": "affected", "version": "1.0.0", "versionType": "semver", "lessThanOrEqual": "2.8.7"}], "defaultStatus": "unaffected"}]}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "affectedData": [{"cpes": ["cpe:/a:redhat:multicluster_globalhub:1.3::el9"], "vendor": "Red Hat", "product": "Multicluster Global Hub 1.3.4", "versions": [{"status": "unaffected", "version": "1779212259", "lessThan": "*", "versionType": "rpm"}], "packageName": "multicluster-globalhub/multicluster-globalhub-grafana-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:multicluster_globalhub:1.4::el9"], "vendor": "Red Hat", "product": "Multicluster Global Hub 1.4.5", "versions": [{"status": "unaffected", "version": "1779579439", "lessThan": "*", "versionType": "rpm"}], "packageName": "multicluster-globalhub/multicluster-globalhub-grafana-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:multicluster_globalhub:1.6::el9"], "vendor": "Red Hat", "product": "Multicluster Global Hub 1.6.5", "versions": [{"status": "unaffected", "version": "1780167118", "lessThan": "*", "versionType": "rpm"}], "packageName": "multicluster-globalhub/multicluster-globalhub-grafana-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:multicluster_globalhub:1.7::el9"], "vendor": "Red Hat", "product": "Multicluster Global Hub 1.7.0", "versions": [{"status": "unaffected", "version": "1779925273", "lessThan": "*", "versionType": "rpm"}], "packageName": "multicluster-globalhub/multicluster-globalhub-grafana-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:multicluster_globalhub:1.5::el9"], "vendor": "Red Hat", "product": "Red Hat multicluster global hub 1.5.3", "versions": [{"status": "unaffected", "version": "1778867753", "lessThan": "*", "versionType": "rpm"}], "packageName": "multicluster-globalhub/multicluster-globalhub-grafana-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:logging:6"], "vendor": "Red Hat", "product": "Logging Subsystem for Red Hat OpenShift", "packageName": "openshift-logging/lokistack-gateway-rhel9", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected"}, {"cpes": ["cpe:/a:redhat:multicluster_globalhub"], "vendor": "Red Hat", "product": "Multicluster Global Hub", "packageName": "multicluster-globalhub/multicluster-globalhub-grafana-rhel8", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected"}, {"cpes": ["cpe:/a:redhat:acm:2"], "vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2", "packageName": "rhacm2/acm-grafana-rhel9", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected"}, {"cpes": ["cpe:/a:redhat:ceph_storage:5"], "vendor": "Red Hat", "product": "Red Hat Ceph Storage 5", "packageName": "rhceph/rhceph-5-dashboard-rhel8", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:ceph_storage:6"], "vendor": "Red Hat", "product": "Red Hat Ceph Storage 6", "packageName": "rhceph/rhceph-6-dashboard-rhel9", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:ceph_storage:9"], "vendor": "Red Hat", "product": "Red Hat Ceph Storage 9", "packageName": "rhceph/grafana-rhel10", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/o:redhat:enterprise_linux:10"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 10", "packageName": "grafana", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected"}, {"cpes": ["cpe:/o:redhat:enterprise_linux:9"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9", "packageName": "grafana", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected"}, {"cpes": ["cpe:/a:redhat:openshift_distributed_tracing:3"], "vendor": "Red Hat", "product": "Red Hat OpenShift distributed tracing 3", "packageName": "rhosdt/tempo-gateway-rhel9", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:openshift_distributed_tracing:3"], "vendor": "Red Hat", "product": "Red Hat OpenShift distributed tracing 3", "packageName": "rhosdt/tempo-query-rhel9", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected"}, {"cpes": ["cpe:/a:redhat:openshift_distributed_tracing:3"], "vendor": "Red Hat", "product": "Red Hat OpenShift distributed tracing 3", "packageName": "rhosdt/tempo-rhel9", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected"}, {"cpes": ["cpe:/a:redhat:openshift_distributed_tracing:3"], "vendor": "Red Hat", "product": "Red Hat OpenShift distributed tracing 3", "packageName": "rhosdt/tempo-rhel9-operator", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected"}]}], "published": "2026-04-24T09:16:03.710", "references": [{"url": "https://grafana.com/security/security-advisories/cve-2026-21728", "tags": ["Broken Link"], "source": "security@grafana.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:21769", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:22347", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:22423", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:23345", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:24503", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/security/cve/CVE-2026-21728", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2461395", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-21728.json", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-400"}]}, {"type": "Secondary", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "description": [{"lang": "en", "value": "CWE-770"}]}], "descriptions": [{"lang": "en", "value": "Tempo queries with large limits can cause large memory allocations which can impact the availability of the service, depending on its deployment strategy.\n\nMitigation can be done by setting max_result_limit in the search config, e.g. to 262144 (2^18). Alternatively, automatically restart the service."}], "lastModified": "2026-09-09T13:18:44.397", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:grafana:tempo:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "AE74525D-4401-4907-BB5F-E4FD2595CA5E", "versionEndExcluding": "2.8.4", "versionStartIncluding": "1.3.0"}, {"criteria": "cpe:2.3:a:grafana:tempo:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4F731ED3-2882-414C-B5FE-679B76A751A4", "versionEndExcluding": "2.9.2", "versionStartIncluding": "2.9.0"}, {"criteria": "cpe:2.3:a:grafana:tempo:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A90B7E68-DFF4-449F-A145-C1ABB0184B2E", "versionEndExcluding": "2.10.2", "versionStartIncluding": "2.10.0"}], "operator": "OR"}]}], "sourceIdentifier": "security@grafana.com"}