grafana/tempo · Security
Grafana Tempo vulnerable to an out-of-memory crash
- GHSA ID
- GHSA-6xff-cpcq-vpw2
- CVE ID
- CVE-2026-27878
- Severity
- medium
- Published
- Updated
- CVSS
- 6.5 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- CVSS v3
- 6.5 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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.
CWEs
- CWE-400 · Uncontrolled Resource Consumption
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-27878 ↗
- https://grafana.com/security/security-advisories/cve-2026-27878 ↗
- https://github.com/grafana/tempo/pull/6559 ↗
- https://github.com/grafana/tempo/pull/6646 ↗
- https://github.com/grafana/tempo/pull/6792 ↗
- https://github.com/grafana/tempo/pull/6802 ↗
- https://github.com/grafana/tempo/commit/3d7c78d438890991df594c20ae2031f8934aba3b ↗
- https://github.com/grafana/tempo/commit/b13f74291d489672601a10297f8fbcbf7dd19192 ↗
- https://github.com/grafana/tempo/commit/b481ae9693f99785691197915066e6306950fa09 ↗
- https://github.com/grafana/tempo/commit/e2d51b786aff94de3319c07994c6a5539b121eb5 ↗
- https://github.com/grafana/tempo/releases/tag/v2.10.2 ↗
- https://github.com/grafana/tempo/releases/tag/v2.8.4 ↗
- https://github.com/grafana/tempo/releases/tag/v2.9.2 ↗
- https://github.com/advisories/GHSA-6xff-cpcq-vpw2 ↗