CVE-2026-21729

Loki detected_fields query limits results in unbounded memory allocation

Published Jul 16, 2026 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Description
Loki queries with large limits can cause large memory allocations which can impact the availability of the service, depending on its deployment strategy.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Weaknesses CWE-770
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Grafana
Grafana loki
Vendors & Products Grafana
Grafana loki
Type Values Removed Values Added
Description Loki queries with large limits can cause large memory allocations which can impact the availability of the service, depending on its deployment strategy.
Title Loki detected_fields query limits results in unbounded memory allocation
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GRAFANA
Published
Updated
Aug 27, 2026, 5:22 PM
Reserved
Jan 5, 2026, 9:26 AM
Status
Awaiting Analysis
Published
Jul 16, 2026, 4:17 AM
Modified
Oct 24, 2026, 9:10 PM