CVE-2026-21729 Loki detected_fields query limits results in unbounded memory allocation

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

CVE-2026-21729 Loki detected_fields query limits results in unbounded memory allocation

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

Loki detected_fields query limits results in unbounded memory allocation

The Loki detectedfields endpoint allocates 2limit elements in slices and maps based on the user-supplied limit query parameter, regardless of actual result count. A massive limit value e.g. 600000000 allocates 20-30 GiB even with zero matching results, causing OOM, resulting in denial of service...