Tempo TraceQL query with exemplar hint could result in unbounded memory usage
cve-program · CVE-2026-27878
PublishedA 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.
Read the publisher's advisoryeuvd · EUVD-2026-38066
PublishedA 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.
Read the publisher's advisorynvd · CVE-2026-27878
PublishedA 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.
Read the publisher's advisoryosv · GHSA-6xff-cpcq-vpw2
PublishedA 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.
Read the publisher's advisoryosv · GO-2026-6325
PublishedGrafana Tempo vulnerable to an out-of-memory crash in github.com/grafana/tempo
Read the publisher's advisoryAffected versions, risk and source history
Related advisories and sources
Publishers link these advisories through the identifiers shown below. A shared identifier or date alone does not tell you whether your software is affected or whether the advisories describe the same cause.
CVE-2026-27878 · CVE overview and exploitation status
cve-program · CVE-2026-27878
euvd · EUVD-2026-38066
nvd · CVE-2026-27878
osv · GHSA-6xff-cpcq-vpw2
- https://nvd.nist.gov/vuln/detail/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
- 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://grafana.com/security/security-advisories/cve-2026-27878
osv · GO-2026-6325
- https://github.com/advisories/GHSA-6xff-cpcq-vpw2
- https://nvd.nist.gov/vuln/detail/CVE-2026-27878
- 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/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/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://grafana.com/security/security-advisories/cve-2026-27878