CVE-2026-21729

HIGH

Loki detected_fields query limits results in unbounded memory allocation

Title source: cna
STIX 2.1

Description

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

References (1)

Core 1
Core References

Scores

CVSS v3 7.5
EPSS 0.0026
EPSS Percentile 17.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-770
Status published
Products (1)
Grafana/Loki v3.0.0 - v3.7.0
Published Jul 16, 2026
Tracked Since Jul 16, 2026