{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-21728", "assignerOrgId": "57da9224-a3e2-4646-9d0e-c4dc2e05e7da", "state": "PUBLISHED", "assignerShortName": "GRAFANA", "dateReserved": "2026-01-05T09:26:06.215Z", "datePublished": "2026-04-24T08:00:47.074Z", "dateUpdated": "2026-07-10T18:44:41.822Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "57da9224-a3e2-4646-9d0e-c4dc2e05e7da", "shortName": "GRAFANA", "dateUpdated": "2026-07-10T18:44:41.822Z" }, "datePublic": "2026-02-23T07:40:45.862Z", "title": "Tempo query limit results in unbounded memory allocation", "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)." } ], "affected": [ { "vendor": "Grafana", "product": "Tempo", "defaultStatus": "unaffected", "versions": [ { "version": "v1.3.0", "status": "affected", "versionType": "semver", "lessThan": "v2.11.0" } ] } ], "references": [ { "url": "https://grafana.com/security/security-advisories/cve-2026-21728", "tags": [ "vendor-advisory" ] } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "baseScore": 7.5, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H" } } ], "source": { "discovery": "INTERNAL_FINDING" }, "x_generator": { "engine": "cvelib 1.8.0" } }, "adp": [ { "problemTypes": [ { "descriptions": [ { "type": "CWE", "cweId": "CWE-400", "lang": "en", "description": "CWE-400 Uncontrolled Resource Consumption" } ] } ], "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-04-24T11:29:58.649315Z", "id": "CVE-2026-21728", "options": [ { "Exploitation": "none" }, { "Automatable": "yes" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-24T13:06:58.775Z" } }, { "affected": [ { "cpes": [ "cpe:/a:redhat:multicluster_globalhub:1.3::el9" ], "defaultStatus": "affected", "product": "Multicluster Global Hub 1.3.4", "vendor": "Red Hat" }, { "cpes": [ "cpe:/a:redhat:multicluster_globalhub:1.4::el9" ], "defaultStatus": "affected", "product": "Multicluster Global Hub 1.4.5", "vendor": "Red Hat" }, { "cpes": [ "cpe:/a:redhat:multicluster_globalhub:1.5::el9" ], "defaultStatus": "affected", "product": "Multicluster Global Hub 1.5.4", "vendor": "Red Hat" }, { "cpes": [ "cpe:/a:redhat:multicluster_globalhub:1.6::el9" ], "defaultStatus": "affected", "product": "Multicluster Global Hub 1.6.2", "vendor": "Red Hat" }, { "cpes": [ "cpe:/a:redhat:multicluster_globalhub:1.7::el9" ], "defaultStatus": "affected", "product": "Multicluster Global Hub 1.7.1", "vendor": "Red Hat" }, { "cpes": [ "cpe:/a:redhat:ceph_storage:5" ], "defaultStatus": "affected", "product": "Red Hat Ceph Storage 5", "vendor": "Red Hat" }, { "cpes": [ "cpe:/a:redhat:ceph_storage:6" ], "defaultStatus": "affected", "product": "Red Hat Ceph Storage 6", "vendor": "Red Hat" }, { "cpes": [ "cpe:/a:redhat:ceph_storage:9" ], "defaultStatus": "affected", "product": "Red Hat Ceph Storage 9", "vendor": "Red Hat" }, { "cpes": [ "cpe:/a:redhat:openshift_distributed_tracing:3" ], "defaultStatus": "affected", "product": "Red Hat OpenShift distributed tracing 3", "vendor": "Red Hat" }, { "cpes": [ "cpe:/a:redhat:logging:6" ], "defaultStatus": "unaffected", "product": "Logging Subsystem for Red Hat OpenShift", "vendor": "Red Hat" }, { "cpes": [ "cpe:/a:redhat:multicluster_globalhub" ], "defaultStatus": "unaffected", "product": "Multicluster Global Hub", "vendor": "Red Hat" }, { "cpes": [ "cpe:/a:redhat:acm:2" ], "defaultStatus": "unaffected", "product": "Red Hat Advanced Cluster Management for Kubernetes 2", "vendor": "Red Hat" }, { "cpes": [ "cpe:/o:redhat:enterprise_linux:10" ], "defaultStatus": "unaffected", "product": "Red Hat Enterprise Linux 10", "vendor": "Red Hat" }, { "cpes": [ "cpe:/o:redhat:enterprise_linux:9" ], "defaultStatus": "unaffected", "product": "Red Hat Enterprise Linux 9", "vendor": "Red Hat" } ], "datePublic": "2026-04-24T08:00:47.074Z", "descriptions": [ { "lang": "en", "value": "A flaw was found in Tempo. A remote attacker can exploit this vulnerability by sending large queries to the Tempo service. This can lead to excessive memory allocations, potentially causing a Denial of Service (DoS) by impacting the availability of the service." } ], "metrics": [ { "other": { "content": { "namespace": "https://access.redhat.com/security/updates/classification/", "value": "Important" }, "type": "Red Hat severity rating" } }, { "cvssV3_1": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1" }, "format": "CVSS" } ], "problemTypes": [ { "descriptions": [ { "cweId": "CWE-770", "description": "Allocation of Resources Without Limits or Throttling", "lang": "en", "type": "CWE" } ] } ], "references": [ { "tags": [ "vdb-entry", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/security/cve/CVE-2026-21728" }, { "name": "RHBZ#2461395", "tags": [ "issue-tracking", "x_refsource_REDHAT" ], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2461395" }, { "tags": [ "x_sadp-csaf-vex" ], "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-21728.json" }, { "tags": [ "vendor-advisory", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/errata/RHSA-2026:22423" }, { "tags": [ "vendor-advisory", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/errata/RHSA-2026:22347" }, { "tags": [ "vendor-advisory", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/errata/RHSA-2026:21769" }, { "tags": [ "vendor-advisory", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/errata/RHSA-2026:23345" }, { "tags": [ "vendor-advisory", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/errata/RHSA-2026:24503" } ], "solutions": [ { "lang": "en", "value": "RHSA-2026:22423: Multicluster Global Hub 1.3.4" }, { "lang": "en", "value": "RHSA-2026:22347: Multicluster Global Hub 1.4.5" }, { "lang": "en", "value": "RHSA-2026:21769: Multicluster Global Hub 1.5.4" }, { "lang": "en", "value": "RHSA-2026:23345: Multicluster Global Hub 1.6.2" }, { "lang": "en", "value": "RHSA-2026:24503: Multicluster Global Hub 1.7.1" } ], "timeline": [ { "lang": "en", "time": "2026-04-24T09:00:58.144Z", "value": "Reported to Red Hat." }, { "lang": "en", "time": "2026-04-24T08:00:47.074Z", "value": "Made public." } ], "title": "grafana/tempo: Tempo: Denial of Service via large queries", "x_adpType": "supplier", "x_generator": { "engine": "sadp-cli 1.0.0" }, "providerMetadata": { "orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "shortName": "redhat-SADP", "dateUpdated": "2026-06-30T12:06:48.938Z" } } ] } }