Loki large limits memory alloc DoS
CVE-2026-21729 Published on July 16, 2026
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.
Weakness Type
Allocation of Resources Without Limits or Throttling
The software allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor.
Affected Versions
Grafana Loki:- Version v3.0.0 and below v3.7.0 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.