CVE-2026-21728
Last modified
CVE-2026-21728 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Tempo queries with large limits can cause large memory allocations which can impact the availability of the service, depending on its deployment strategy. Mitigation can be done by setting max_result_limit in the search config, e.g. to 262144 (2^18). EPSS estimates a 0.64% chance of exploitation in the next 30 days.
Description
Tempo queries with large limits can cause large memory allocations which can impact the availability of the service, depending on its deployment strategy. Mitigation can be done by setting max_result_limit in the search config, e.g. to 262144 (2^18). Alternatively, automatically restart the service.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Grafana | Tempo | >= 1.3.0, < 2.8.4 |
| Grafana | Tempo | >= 2.9.0, < 2.9.2 |
| Grafana | Tempo | >= 2.10.0, < 2.10.2 |
References
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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