CVE-2026-27878— Tempo TraceQL query with exemplar hint could result in unbounded memory usage
Possible ATT&CK Techniques 1AI
T1499 · Endpoint Denial of ServiceAffected Version Matrix 2
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Grafana | Enterprise Traces (GET) | 2.6.1< 2.8.8 | affected |
| Grafana | Tempo | 2.6.0< 2.10.2 | affected |
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I. Basic Information for CVE-2026-27878
Vulnerability Information
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Vulnerability Title
Tempo TraceQL query with exemplar hint could result in unbounded memory usage
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Grafana | Enterprise Traces (GET) | 2.6.1 ~ 2.8.8 | - | |
| Grafana | Tempo | 2.6.0 ~ 2.10.2 | - |
II. Public POCs for CVE-2026-27878
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-27878 (1)
- 🔗 404 Page not found | Grafana Labsvendor-advisory
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V. Comments for CVE-2026-27878
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