CVE-2026-21728

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"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 1.6.2", "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 1.7.2", "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 1.5.0", "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": "2026-07-30T12:17:27.960", "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"}