Tempo TraceQL query with exemplar hint could result in unbounded memory usage
Exploitation and risk
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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.
- Source published
- 19 Jun 2026 19:02:27 UTC
- Source modified
- 27 Aug 2026 17:22:34 UTC
- Saved here
- 23 Oct 2026 15:48:27 UTC
- Source terms
- CVE Program Terms of Use
Original source record · Cite this exact observation · Complete original publisher JSON
Source: cve-program · CVE Program Terms of Use. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.
CVSS 3.1 · 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
euvd · 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.
Additional publisher context
EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.
Original publisher date fields
datePublished: Jun 19, 2026, 7:02:27 PM
dateUpdated: Aug 27, 2026, 5:22:34 PM
1 related source bulletins · separate from aliases
WID-SEC-W-2026-2342: Grafana Tempo: Mehrere Schwachstellen ermöglichen Denial of Service
CVE-2026-21728 · CVE-2026-27878
- Source published
- Jun 19, 2026, 7:02:27 PM (timezone not stated)
- Source modified
- Aug 27, 2026, 5:22:34 PM (timezone not stated)
- Saved here
- 15 Nov 2026 09:27:32 UTC
- Source terms
- ENISA EUVD · source terms and attribution apply
Original source record · Cite this exact observation · Complete original publisher JSON
Source: euvd · ENISA EUVD · source terms and attribution apply. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.
EUVD CVSS 3.1 · 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
nvd · 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.
Additional publisher context
NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.
Source analysis status: Analyzed
Weakness classifications: CWE-400
Original publisher date fields
published: 2026-06-19T19:16:34.897
lastModified: 2026-06-29T19:59:27.563
1 source CPE criteria · context only
- cpe:2.3:a:grafana:tempo:*:*:*:*:*:*:*:*
The original JSON retains the logical configuration operators, exclusions and version bounds.
- Source published
- 19 Jun 2026 19:16:34 UTC
- Source modified
- 29 Jun 2026 19:59:27 UTC
- Saved here
- 25 Oct 2026 06:17:33 UTC
- Source terms
- NIST NVD usage terms; underlying source attribution retained
Original source record · Cite this exact observation · Complete original publisher JSON
Source: nvd · NIST NVD usage terms; underlying source attribution retained. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.
CVSS 3.1 · [email protected] · Secondary · 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv · 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.
- Source published
- 19 Jun 2026 21:32:47 UTC
- Source modified
- 10 Sep 2026 03:50:48 UTC
- Saved here
- 24 Oct 2026 13:19:41 UTC
- Source terms
- GitHub Advisory Database · CC-BY-4.0
Original source record · Cite this exact observation · Complete original publisher JSON
Source: osv · GitHub Advisory Database · CC-BY-4.0. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.
CVSS_V3 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Publisher rating · MODERATE
osv · GO-2026-6325
PublishedGrafana Tempo vulnerable to an out-of-memory crash in github.com/grafana/tempo
- Source published
- 2 Sep 2026 18:37:27 UTC
- Source modified
- 6 Sep 2026 03:25:56 UTC
- Saved here
- 24 Oct 2026 13:19:41 UTC
- Source terms
- OSV · upstream source license applies
Original source record · Cite this exact observation · Complete original publisher JSON
Source: osv · OSV · upstream source license applies. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.