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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-memory crash. This could allow an authenticated user to trigger a denial of service against the Tempo service.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:f8cc708a0b87ee1eb0e04ea867552e6901b4c2b8e72c28dd2b13fa828ee163f2
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"defaultStatus":"unaffected","product":"Tempo","vendor":"Grafana","versions":[{"lessThan":"2.10.2","status":"affected","version":"2.6.0","versionType":"semver"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ed826f724ab6941e54e3e62fccb6dae99ae6bbceaac56310946fc923174ac225 · sha256:cd5d3fd005036303… · /containers/cna/affected/1

{"defaultStatus":"unaffected","product":"Enterprise Traces (GET)","vendor":"Grafana","versions":[{"lessThan":"2.8.8","status":"affected","version":"2.6.1","versionType":"semver"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ed826f724ab6941e54e3e62fccb6dae99ae6bbceaac56310946fc923174ac225 · sha256:cd5d3fd005036303… · /containers/cna/affected/0

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","product":"Tempo","vendor":"Grafana","versions":[{"lessThan":"2.10.2","status":"affected","version":"2.6.0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ed826f724ab6941e54e3e62fccb6dae99ae6bbceaac56310946fc923174ac225 · sha256:cd5d3fd005036303… · /containers/cna/affected/1
{"defaultStatus":"unaffected","product":"Enterprise Traces (GET)","vendor":"Grafana","versions":[{"lessThan":"2.8.8","status":"affected","version":"2.6.1","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ed826f724ab6941e54e3e62fccb6dae99ae6bbceaac56310946fc923174ac225 · sha256:cd5d3fd005036303… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":6.5,"baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:ed826f724ab6941e54e3e62fccb6dae99ae6bbceaac56310946fc923174ac225 · sha256:cd5d3fd005036303… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-400","description":"CWE-400 Uncontrolled Resource Consumption","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ed826f724ab6941e54e3e62fccb6dae99ae6bbceaac56310946fc923174ac225 · sha256:cd5d3fd005036303… · /containers/adp/0/problemTypes/0/descriptions/0

Source references

1 source assertion
{"tags":["vendor-advisory"],"url":"https://grafana.com/security/security-advisories/cve-2026-27878"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ed826f724ab6941e54e3e62fccb6dae99ae6bbceaac56310946fc923174ac225 · sha256:cd5d3fd005036303… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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