CVE-2026-27878

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH confidence

Score 6.5 from GitHub Security Advisory published 2026-06-19. a secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.5Exploit: NoneExposed: 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(high)
EPSS
14.3%
KEV
Not listed

Published

June 19, 2026

Last Modified

June 29, 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.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 22× in last 7d / 54× 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.

  1. 2026-07-07 02:19 UTCEG score recompute
  2. 2026-07-07 02:19 UTCGHSA enrichment
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 16:27 UTCEPSS rescore
  5. 2026-07-06 02:23 UTCEPSS rescore
  6. 2026-07-06 02:23 UTCEPSS rescore
  7. 2026-07-06 00:45 UTCEG score recompute
  8. 2026-07-06 00:45 UTCGHSA enrichment
  9. 2026-07-04 23:16 UTCEG score recompute
  10. 2026-07-04 23:16 UTCGHSA enrichment
  11. 2026-07-03 21:45 UTCEG score recompute
  12. 2026-07-03 21:45 UTCGHSA enrichment
  13. 2026-07-02 20:15 UTCEG score recompute
  14. 2026-07-02 20:15 UTCGHSA enrichment
  15. 2026-07-01 18:46 UTCEG score recompute
  16. 2026-07-01 18:46 UTCGHSA enrichment
  17. 2026-07-01 15:06 UTCEPSS rescore
  18. 2026-07-01 15:06 UTCEPSS rescore
  19. 2026-06-30 23:22 UTCEPSS rescore
  20. 2026-06-30 23:22 UTCEPSS rescore
  21. 2026-06-30 17:16 UTCEG score recompute
  22. 2026-06-30 17:16 UTCGHSA enrichment
  23. 2026-06-29 15:43 UTCEG score recompute
  24. 2026-06-29 15:43 UTCGHSA enrichment
  25. 2026-06-29 14:06 UTCEPSS rescore
Show 29 more
  1. 2026-06-28 14:11 UTCEG score recompute
  2. 2026-06-28 14:11 UTCGHSA enrichment
  3. 2026-06-28 14:07 UTCEPSS rescore
  4. 2026-06-28 14:07 UTCEPSS rescore
  5. 2026-06-28 04:56 UTCEPSS rescore
  6. 2026-06-28 04:56 UTCEPSS rescore
  7. 2026-06-27 12:42 UTCEG score recompute
  8. 2026-06-27 12:42 UTCGHSA enrichment
  9. 2026-06-27 03:08 UTCEPSS rescore
  10. 2026-06-26 11:12 UTCEG score recompute
  11. 2026-06-26 11:12 UTCGHSA enrichment
  12. 2026-06-25 13:49 UTCEPSS rescore
  13. 2026-06-25 13:49 UTCEPSS rescore
  14. 2026-06-25 05:14 UTCEG score recompute
  15. 2026-06-25 05:14 UTCGHSA enrichment
  16. 2026-06-24 14:05 UTCEPSS rescore
  17. 2026-06-24 14:05 UTCEPSS rescore
  18. 2026-06-24 03:44 UTCEG score recompute
  19. 2026-06-24 03:44 UTCGHSA enrichment
  20. 2026-06-23 21:33 UTCEPSS rescore
  21. 2026-06-23 21:32 UTCEPSS rescore
  22. 2026-06-23 02:14 UTCEG score recompute
  23. 2026-06-23 02:13 UTCGHSA enrichment
  24. 2026-06-22 00:44 UTCEG score recompute
  25. 2026-06-22 00:44 UTCGHSA enrichment
  26. 2026-06-20 23:09 UTCEG score recompute
  27. 2026-06-20 23:09 UTCGHSA enrichment
  28. 2026-06-19 21:37 UTCEG score recompute
  29. 2026-06-19 21:37 UTCGHSA enrichment

Related CVEs(same CWE)

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 June 29, 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 14.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-27878?
CVE-2026-27878 has a CVSS v3 base score of 6.5 (NVD).
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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