Memory Allocation Vulnerability in Tempo by Grafana
CVE-2026-21728

7.5HIGH

Key Information:

Vendor

Grafana
Status
Tempo
Vendor
CVE Published:
24 April 2026

What is CVE-2026-21728?

Tempo has a vulnerability where large query limits can lead to excessive memory allocation. This can hinder service availability depending on how Tempo is deployed. Users are advised to configure the search settings by adjusting the max_result_limit to mitigate potential impacts.

Affected Version(s)

Tempo OnPrem v1.3.0

References

https://grafana.com/security/security-advisories/cve-2026...
vendor-advisory

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.