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Advisory record · GHSA-6xff-cpcq-vpw2

Grafana Tempo vulnerable to an out-of-memory crash

CVSS 6.5 MediumEPSS 0.0041 · 35th percentile

Published by the GitHub Advisory Database at 19 Jun 2026, 21:32 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/grafana/tempoGo<1.5.1-0.20260303204923-b13f74291d481.5.1-0.20260303204923-b13f74291d48
Identifiers
GHSA-6xff-cpcq-vpw2 · CVE-2026-27878 · GO-2026-6325
Weakness (CWE)
CWE-400
Tags
Published
19 Jun 2026
Updated
10 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Grafana Tempo (github.com/grafana/tempo) versions before 1.5.1-0.20260303204923-b13f74291d48 are vulnerable. An authenticated user can send a TraceQL query with a large exemplars hint value, causing Tempo to allocate excessive memory and crash from out-of-memory, which is a denial of service. Upgrade to 1.5.1-0.20260303204923-b13f74291d48 or later. No workaround is listed.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
6.5 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CNA (GRAFANA)
  • CISA KEV Not listed.
  • EPSS 0.0041, the 35th percentile, on 15 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:14 UTC First seen by agentprime
  2. 31 Oct 2026, 14:14 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.