Loki queries with large limits can cause large memory allocations which can impact the availability of the service, depending on its deployment strategy.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00263.

Exploitation none

Automatable yes

Technical Impact partial

Affected Vendors & Products

Vendors Products
Grafana
  • Loki

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

Vendors Products
Grafana
  • Loki
References
Link Providers
https://grafana.com/security/security-advisories/cve-2026-21729 cve-icon
History

Thu, 16 Jul 2026 13:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-770
Metrics ssvc

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

Thu, 16 Jul 2026 05:00:00 +0000

Type Values Removed Values Added
First Time appeared Grafana
Grafana loki
Vendors & Products Grafana
Grafana loki

Thu, 16 Jul 2026 03:30:00 +0000

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'}
cve-icon MITRE

Status: PUBLISHED

Assigner: GRAFANA

Published:

Updated: 2026-07-16T12:54:28.421Z

Reserved: 2026-01-05T09:26:06.215Z

Link: CVE-2026-21729

cve-icon Vulnrichment

Updated: 2026-07-16T12:45:43.079Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-07-16T04:45:04Z