{"id":"CVE-2026-21728","revision":"53e07b6368214ed0bf524b89b47bb71d","records":[{"revision":"53e07b6368214ed0bf524b89b47bb71d","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-21728","aliases":[],"title":"Tempo query limit results in unbounded memory allocation","description":"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.","state":0,"publishedAt":"2026-04-24T08:00:47.074+00:00","modifiedAt":"2026-09-09T12:04:42.986+00:00","affected":[{"ecosystem":"Vendor product","name":"Tempo","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Grafana\",\n                    \"product\": \"Tempo\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"1.3.0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThanOrEqual\": \"2.8.3\"\n                        },\n                        {\n                            \"version\": \"2.9.0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThanOrEqual\": \"2.9.1\"\n                        },\n                        {\n                            \"version\": \"2.10.0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThanOrEqual\": \"2.10.1\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Enterprise Traces (GET)","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Grafana\",\n                    \"product\": \"Enterprise Traces (GET)\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"1.0.0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThanOrEqual\": \"2.8.7\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://grafana.com/security/security-advisories/cve-2026-21728"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-21728","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-21728","identifiers":["CVE-2026-21728"]},"retained":false,"historicalAffected":[]}],"coverage":[]}