{"id":"GHSA-6xff-cpcq-vpw2","summary":"Grafana Tempo vulnerable to an out-of-memory crash","details":"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.","aliases":["CVE-2026-27878","GO-2026-6325"],"modified":"2026-09-02T19:55:59.639125623Z","published":"2026-06-19T21:32:47Z","database_specific":{"github_reviewed_at":"2026-08-28T21:50:55Z","nvd_published_at":"2026-06-19T19:16:34Z","cwe_ids":["CWE-400"],"severity":"MODERATE","github_reviewed":true},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-27878"},{"type":"WEB","url":"https://github.com/grafana/tempo/pull/6559"},{"type":"WEB","url":"https://github.com/grafana/tempo/pull/6646"},{"type":"WEB","url":"https://github.com/grafana/tempo/pull/6792"},{"type":"WEB","url":"https://github.com/grafana/tempo/pull/6802"},{"type":"WEB","url":"https://github.com/grafana/tempo/commit/3d7c78d438890991df594c20ae2031f8934aba3b"},{"type":"WEB","url":"https://github.com/grafana/tempo/commit/b13f74291d489672601a10297f8fbcbf7dd19192"},{"type":"WEB","url":"https://github.com/grafana/tempo/commit/b481ae9693f99785691197915066e6306950fa09"},{"type":"WEB","url":"https://github.com/grafana/tempo/commit/e2d51b786aff94de3319c07994c6a5539b121eb5"},{"type":"PACKAGE","url":"https://github.com/grafana/tempo"},{"type":"WEB","url":"https://github.com/grafana/tempo/releases/tag/v2.10.2"},{"type":"WEB","url":"https://github.com/grafana/tempo/releases/tag/v2.8.4"},{"type":"WEB","url":"https://github.com/grafana/tempo/releases/tag/v2.9.2"},{"type":"WEB","url":"https://grafana.com/security/security-advisories/cve-2026-27878"}],"affected":[{"package":{"name":"github.com/grafana/tempo","ecosystem":"Go","purl":"pkg:golang/github.com/grafana/tempo"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.5.1-0.20260303204923-b13f74291d48"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-6xff-cpcq-vpw2/GHSA-6xff-cpcq-vpw2.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}