{"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": "2026-04-24T13:06:58.775Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "57da9224-a3e2-4646-9d0e-c4dc2e05e7da", "shortName": "GRAFANA", "dateUpdated": "2026-04-24T08:00:47.074Z"}, "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", "platforms": ["OnPrem"], "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"}}]}}

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{"cveTags": [], "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)."}], "id": "CVE-2026-21728", "lastModified": "2026-04-24T09:16:03.710", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security@grafana.com", "type": "Secondary"}]}, "published": "2026-04-24T09:16:03.710", "references": [{"source": "security@grafana.com", "url": "https://grafana.com/security/security-advisories/cve-2026-21728"}], "sourceIdentifier": "security@grafana.com", "vulnStatus": "Received"}

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