Vulnerability details
CVE-2026-21729
Grafana Loki
Loki detected_fields query limits results in unbounded memory allocation
CVSS 3.1
7.5High
Official description
Loki queries with large limits can cause large memory allocations which can impact the availability of the service, depending on its deployment strategy.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.5High | 3.1 | CVEProject cvelistV5 (CNA) (GRAFANA) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Grafana | Loki | v3.0.0 ≤ v < v3.7.0 | CVEProject cvelistV5 (CNA) |
References and advisories
1- https://grafana.com/security/security-advisories/cve-2026-21729 vendor-advisory
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Details
- Published
- 2026-07-16
- Last updated
- 2026-08-27
- State
- Published
- Assigner (CNA)
- GRAFANA
Exploit prediction (EPSS)
0.46%
Probability of exploitation in 30 days
40%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- None
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-770Allocation of Resources Without Limits or Throttling