{"id":"CVE-2026-27878","state":"PUBLISHED","title":"Tempo TraceQL query with exemplar hint could result in unbounded memory usage","description":"A TraceQL query in Grafana Tempo with a large exemplars hint value can cause the Tempo instance to allocate an excessive amount of memory, resulting in an out-of-memory crash. This could allow an authenticated user to trigger a denial of service against the Tempo service.","publishedAt":"2026-06-19T19:02:27.028Z","updatedAt":"2026-08-27T17:22:34.267Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"GRAFANA"},"assigner":"GRAFANA","products":["Grafana Enterprise Traces (GET)","Grafana Tempo"],"affected":[{"vendor":"Grafana","product":"Enterprise Traces (GET)","defaultStatus":"unaffected","versions":[{"version":"2.6.1","status":"affected","lessThan":"2.8.8","versionType":"semver"}]},{"vendor":"Grafana","product":"Tempo","defaultStatus":"unaffected","versions":[{"version":"2.6.0","status":"affected","lessThan":"2.10.2","versionType":"semver"}]}],"references":["https://grafana.com/security/security-advisories/cve-2026-27878"],"weaknesses":["CWE-400"],"ingestedAt":"2026-10-29T20:11:31.369Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/27xxx/CVE-2026-27878.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-27878","state":"PUBLISHED","datePublished":"2026-06-19T19:02:27.028Z","dateUpdated":"2026-08-27T17:22:34.267Z","assignerShortName":"GRAFANA","assignerOrgId":"57da9224-a3e2-4646-9d0e-c4dc2e05e7da","dateReserved":"2026-02-24T14:30:17.726Z"},"containers":{"cna":{"title":"Tempo TraceQL query with exemplar hint could result in unbounded memory usage","descriptions":[{"lang":"en","value":"A TraceQL query in Grafana Tempo with a large exemplars hint value can cause the Tempo instance to allocate an excessive amount of memory, resulting in an out-of-memory crash. This could allow an authenticated user to trigger a denial of service against the Tempo service."}],"affected":[{"vendor":"Grafana","product":"Enterprise Traces (GET)","defaultStatus":"unaffected","versions":[{"version":"2.6.1","status":"affected","lessThan":"2.8.8","versionType":"semver"}]},{"vendor":"Grafana","product":"Tempo","defaultStatus":"unaffected","versions":[{"version":"2.6.0","status":"affected","lessThan":"2.10.2","versionType":"semver"}]}],"references":[{"url":"https://grafana.com/security/security-advisories/cve-2026-27878","tags":["vendor-advisory"]}],"metrics":[{"cvssV3_1":{"version":"3.1","baseScore":6.5,"baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}}],"providerMetadata":{"shortName":"GRAFANA","orgId":"57da9224-a3e2-4646-9d0e-c4dc2e05e7da","dateUpdated":"2026-08-27T17:22:34.267Z"},"datePublic":"2026-03-23T19:28:24.658Z","source":{"discovery":"INTERNAL_FINDING"},"x_generator":{"engine":"cvelib 1.8.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-22T17:09:51.414285Z","id":"CVE-2026-27878","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-400","type":"CWE","lang":"en","description":"CWE-400 Uncontrolled Resource Consumption"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-23T12:14:04.829Z"}}]}}}