VulnSocial

CVE-2026-27878Disclosure(grafana / tempo)

LOWCVSS 6.5 · MEDIUM

Signal is active with 2 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD 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.

grafana CVEsBack to dashboard
0.0/ 10 priority

Sources & remediation

Other references
Weakness type (CWE)
CWE-400

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • tempo

Threat summary

  • 3 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Technical details provided in 3 signals
  • Disclosure: 3 classified signals
  • Peaked at 2 mentions on most recent observed day (2026-06-20)
  • 3 total mentions across 2 days

Affected systems

Vendors
grafana
Products
tempo

Deep dive

Activity timeline3 mentions / 2d
01122Mentions · 2026-06-19: 1Mentions · 2026-06-20: 2Technical Details · 2026-06-19: 1Technical Details · 2026-06-20: 206-1906-20
Signal classification1 categories
Disclosure
3100.0%
Referenced assets3 URLs
Classification over time
DateTotalLabels
2026-06-191
Disclosure1
2026-06-202
Disclosure2
Full discourse3 posts
  • Infoflowcloud@infoflowcloud
    Disclosure

    🚨*CVE* CVE-2026-27878 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-memo… https://www.cve.org/CVERecord?id=CVE-2026-27878 ----- Traducción: CVE-2026-27878 Una… http://infoflow.cloud`

    Post summary

    The tweet announces CVE‑2026‑27878, describing a memory‑allocation issue in Grafana Tempo triggered by oversized TraceQL query values, and links to the official CVE record.

    0000028
    88 followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-27878 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-memo… https://www.cve.org/CVERecord?id=CVE-2026-27878

    Post summary

    Disclosed CVE-2026-27878 causes an out-of-memory crash in Grafana Tempo when a TraceQL query includes a large exemplars hint value.

    00000282
    57.7K followersView on X
  • Vulmon Vulnerability Feed@VulmonFeeds
    Disclosure

    CVE-2026-27878 Denial of Service via Excessive Memory Allocation in Grafana Tempo TraceQL Queries https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-27878

    Post summary

    A denial-of-service vulnerability (CVE‑2026‑27878) in Grafana Tempo TraceQL Queries was disclosed, with no PoC, exploit, or patch information provided.

    0000047
    4.1K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appgrafanatempo---

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