Vulnerability · Published Jul 16, 2026 · Assigned by GRAFANA
CVE-2026-21729Loki detected_fields query limits results in unbounded memory allocation
High 7.5
In plain English
A high-severity resource allocation without limits in Loki from Grafana. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities).
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.5%top 59.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Loki queries with large limits can cause large memory allocations which can impact the availability of the service, depending on its deployment strategy.
Affected products (as reported)
Weakness: CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- https://grafana.com/security/security-advisories/cve-2026-21729 vendor-advisory