{
"id": "GHSA-6xff-cpcq-vpw2",
"aliases": [
"CVE-2026-27878"
],
"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.",
"summary": "Grafana Tempo vulnerable to an out-of-memory crash",
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.5.1-0.20260303204923-b13f74291d48"
}
]
}
],
"package": {
"name": "github.com/grafana/tempo",
"ecosystem": "Go"
}
}
],
"modified": "2026-08-28T21:50:55Z",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
}
],
"published": "2026-06-19T21:32:47Z",
"references": [
{
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27878",
"type": "ADVISORY"
},
{
"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": "WEB"
},
{
"url": "https://github.com/grafana/tempo",
"type": "PACKAGE"
},
{
"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",
"type": "WEB"
}
],
"schema_version": "1.4.0",
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"severity": "MODERATE",
"github_reviewed": true,
"nvd_published_at": "2026-06-19T19:16:34Z",
"github_reviewed_at": "2026-08-28T21:50:55Z"
}
}