CVE Catalog

CVE-2026-21729

HighCVSS 7.5
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.26%

18th percentile - higher than 18% of all known CVEs

Summary

A vulnerability in Loki allows queries with large limits to cause significant memory allocations, potentially impacting service availability depending on the deployment strategy.

Risk Assessment

An attacker could exploit this vulnerability to overload the Loki server, causing a denial of service (DoS) and disrupting monitored systems.

Recommendation

It is recommended to restrict maximum query limits in Loki configuration and implement memory usage monitoring to detect anomalies.

Related vulnerabilities

Original NVD description (English source)

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

Vulnerability data from NVD (NIST) · CISA KEV · EPSS