CVE-2026-27878 Details
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.
A denial-of-service vulnerability has been identified in Grafana Tempo. When an authenticated user submits a TraceQL query with a large exemplars hint value, it can cause the Tempo instance to use an excessive amount of memory. This overconsumption of resources leads to an out-of-memory crash, disrupting the Tempo service.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jun 22, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://grafana.com/security/security-advisories/cve-2026-27878 | [email protected] | Broken Link |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-400 | Uncontrolled Resource Consumption | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| grafana tempo | >= 2.6.0, < 2.8.4 >= 2.9.0, < 2.9.2 >= 2.10.0, < 2.10.2 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 29, 2026 | Initial Analysis | [email protected] |
| Jun 23, 2026 | CVE Modified | CISA-ADP |
| Jun 22, 2026 | CVE Modified | CISA-ADP |
| Jun 19, 2026 | New CVE Received | [email protected] |