{"cve":"CVE-2026-21728","nvd":{"published":"2026-04-24T09:16:03.710","modified":"2026-10-26T21:10:00.170","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"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},"cwes":["CWE-400","CWE-770"],"references":["https://grafana.com/security/security-advisories/cve-2026-21728","https://access.redhat.com/errata/RHSA-2026:21769","https://access.redhat.com/errata/RHSA-2026:22347","https://access.redhat.com/errata/RHSA-2026:22423","https://access.redhat.com/errata/RHSA-2026:23345"],"products":["grafana:tempo"],"source":"nvd","synced_at":"2026-10-26T21:38:48.864438205+00:00"},"epss":{"cve":"CVE-2026-21728","score":0.00637,"percentile":0.50238,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-p4r4-xvrq-gvmc","url":"https://osv.dev/vulnerability/GHSA-p4r4-xvrq-gvmc","summary":"Grafana Tempo has an Uncontrolled Resource Consumption issue","modified":"2026-09-10T03:50:44.808071031Z","packages":[{"ecosystem":"Go","name":"github.com/grafana/tempo","purl":"pkg:golang/github.com/grafana/tempo","ranges":[">=1.3.0 <2.8.4"],"fixed":["2.8.4"]},{"ecosystem":"Go","name":"github.com/grafana/tempo","purl":"pkg:golang/github.com/grafana/tempo","ranges":[">=2.9.0 <2.9.2"],"fixed":["2.9.2"]},{"ecosystem":"Go","name":"github.com/grafana/tempo","purl":"pkg:golang/github.com/grafana/tempo","ranges":[">=2.10.0 <2.10.2"],"fixed":["2.10.2"]}]},{"id":"GO-2026-5528","url":"https://osv.dev/vulnerability/GO-2026-5528","summary":"Grafana Tempo has an Uncontrolled Resource Consumption issue in github.com/grafana/tempo","modified":"2026-07-08T15:29:23.719271975Z","packages":[{"ecosystem":"Go","name":"github.com/grafana/tempo","purl":"pkg:golang/github.com/grafana/tempo","ranges":[">=1.3.0"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}