CVE-2026-27878

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2026-06-19. the CNA's CVSS baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:grafana, epss, ghsa
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
35%
KEV
Not listed

Published

June 19, 2026

Last Modified

August 27, 2026

References (1)

Vendor Advisories for CVE-2026-27878(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFixed inDependents
github.com/grafana/tempo—1.5.1-0.20260303204923-b13f74291d48—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 6× in last 7d / 57× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 185 total refreshes for this CVE.

  1. 2026-09-11 14:52 UTCEPSS rescore
  2. 2026-09-10 09:34 UTCEPSS rescore
  3. 2026-09-08 22:00 UTCEPSS rescore
  4. 2026-09-07 16:01 UTCEPSS rescore
  5. 2026-09-06 13:47 UTCEPSS rescore
  6. 2026-09-06 13:47 UTCEPSS rescore
  7. 2026-09-04 05:06 UTCEPSS rescore
  8. 2026-09-02 14:11 UTCEPSS rescore
  9. 2026-09-01 13:53 UTCEPSS rescore
  10. 2026-09-01 04:39 UTCEPSS rescore
  11. 2026-09-01 04:39 UTCEPSS rescore
  12. 2026-08-30 20:45 UTCEG score recompute
  13. 2026-08-30 19:17 UTCEPSS rescore
  14. 2026-08-30 01:22 UTCEPSS rescore
  15. 2026-08-28 21:41 UTCEPSS rescore
  16. 2026-08-27 18:02 UTCEG score recompute
  17. 2026-08-27 18:01 UTCGHSA enrichment
  18. 2026-08-27 14:25 UTCEPSS rescore
  19. 2026-08-26 14:46 UTCEPSS rescore
  20. 2026-08-26 09:14 UTCEG score recompute
  21. 2026-08-26 09:14 UTCGHSA enrichment
  22. 2026-08-25 13:48 UTCEPSS rescore
  23. 2026-08-24 14:02 UTCEG score recompute
  24. 2026-08-24 14:02 UTCGHSA enrichment
  25. 2026-08-24 01:26 UTCEG score recompute
Show 75 more
  1. 2026-08-24 01:26 UTCGHSA enrichment
  2. 2026-08-23 00:19 UTCEPSS rescore
  3. 2026-08-22 23:53 UTCEG score recompute
  4. 2026-08-22 23:53 UTCGHSA enrichment
  5. 2026-08-21 23:49 UTCEPSS rescore
  6. 2026-08-21 22:23 UTCEG score recompute
  7. 2026-08-21 22:23 UTCGHSA enrichment
  8. 2026-08-20 22:55 UTCEPSS rescore
  9. 2026-08-20 20:44 UTCGHSA enrichment
  10. 2026-08-19 19:14 UTCGHSA enrichment
  11. 2026-08-19 18:59 UTCGHSA enrichment
  12. 2026-08-19 17:51 UTCEG score recompute
  13. 2026-08-19 17:51 UTCGHSA enrichment
  14. 2026-08-19 17:03 UTCEPSS rescore
  15. 2026-08-19 05:50 UTCEG score recompute
  16. 2026-08-19 05:50 UTCGHSA enrichment
  17. 2026-08-18 13:48 UTCEPSS rescore
  18. 2026-08-17 21:44 UTCEG score recompute
  19. 2026-08-17 21:44 UTCGHSA enrichment
  20. 2026-08-17 13:47 UTCEPSS rescore
  21. 2026-08-16 20:24 UTCEG score recompute
  22. 2026-08-16 20:24 UTCGHSA enrichment
  23. 2026-08-16 14:56 UTCEPSS rescore
  24. 2026-08-16 02:14 UTCEPSS rescore
  25. 2026-08-15 18:10 UTCEG score recompute
  26. 2026-08-15 18:10 UTCGHSA enrichment
  27. 2026-08-15 01:30 UTCEPSS rescore
  28. 2026-08-14 16:40 UTCEG score recompute
  29. 2026-08-14 16:40 UTCGHSA enrichment
  30. 2026-08-13 22:00 UTCEPSS rescore
  31. 2026-08-13 14:55 UTCEG score recompute
  32. 2026-08-13 14:55 UTCGHSA enrichment
  33. 2026-08-12 13:50 UTCEPSS rescore
  34. 2026-08-12 13:26 UTCGHSA enrichment
  35. 2026-08-12 07:05 UTCEG score recompute
  36. 2026-08-12 07:05 UTCGHSA enrichment
  37. 2026-08-11 13:42 UTCEPSS rescore
  38. 2026-08-11 05:34 UTCEG score recompute
  39. 2026-08-11 05:34 UTCGHSA enrichment
  40. 2026-08-11 00:00 UTCEPSS rescore
  41. 2026-08-10 17:26 UTCGHSA enrichment
  42. 2026-08-09 14:48 UTCEG score recompute
  43. 2026-08-09 14:48 UTCGHSA enrichment
  44. 2026-08-09 13:46 UTCEPSS rescore
  45. 2026-08-08 16:37 UTCEPSS rescore
  46. 2026-08-08 13:19 UTCEG score recompute
  47. 2026-08-08 13:19 UTCGHSA enrichment
  48. 2026-08-07 11:49 UTCEG score recompute
  49. 2026-08-07 11:49 UTCGHSA enrichment
  50. 2026-08-06 13:46 UTCEPSS rescore
  51. 2026-08-06 10:20 UTCEG score recompute
  52. 2026-08-06 10:20 UTCGHSA enrichment
  53. 2026-08-05 19:17 UTCEPSS rescore
  54. 2026-08-05 08:50 UTCEG score recompute
  55. 2026-08-05 08:50 UTCGHSA enrichment
  56. 2026-08-04 15:10 UTCEPSS rescore
  57. 2026-08-04 04:34 UTCEG score recompute
  58. 2026-08-04 04:34 UTCGHSA enrichment
  59. 2026-08-03 10:36 UTCEPSS rescore
  60. 2026-08-03 03:04 UTCEG score recompute
  61. 2026-08-03 03:04 UTCGHSA enrichment
  62. 2026-08-02 02:26 UTCEPSS rescore
  63. 2026-08-02 01:33 UTCEG score recompute
  64. 2026-08-02 01:33 UTCGHSA enrichment
  65. 2026-08-01 04:16 UTCEPSS rescore
  66. 2026-08-01 00:04 UTCGHSA enrichment
  67. 2026-07-30 22:17 UTCEG score recompute
  68. 2026-07-30 22:16 UTCGHSA enrichment
  69. 2026-07-30 16:27 UTCEPSS rescore
  70. 2026-07-30 01:30 UTCEPSS rescore
  71. 2026-07-29 14:50 UTCGHSA enrichment
  72. 2026-07-29 09:58 UTCEG score recompute
  73. 2026-07-29 09:58 UTCGHSA enrichment
  74. 2026-07-28 15:36 UTCEPSS rescore
  75. 2026-07-28 08:28 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-27878?
CVE-2026-27878 is a medium vulnerability published on June 19, 2026. 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.
When was CVE-2026-27878 disclosed?
CVE-2026-27878 was first published in the National Vulnerability Database on June 19, 2026, with the most recent update on August 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-27878 actively exploited?
CVE-2026-27878 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 65.5% of all scored CVEs.
What is the CVSS score of CVE-2026-27878?
CVE-2026-27878 has a CVSS v4.0 base score of 6.5 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-27878?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-27878, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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