CVE-2026-21729: Loki queries with large limits can cause large memory allocations which can impact the availability of the service, depending on its deployment strategy.

highCVSS 7.5CVE-2026-21729

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

Details

Source: NVD Recent CVEs (US · database · site)
Severity: high — CVSS 7.5
Published: 2026-07-16
Last updated: 2026-07-16
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-21729

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-217290.26% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 18% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-21729	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

medium[NEW] [medium] Grafana Loki: Vulnerability allows Denial of Servicecert-bund
unknownGrafana security advisory (AV26-710)cccs

CVE-2026-21729: Loki queries with large limits can cause large memory allocations which can impact the availability of the service, depending on its deployment strategy.

Details

Exploitation outlook

Referenced CVEs

Same CVEs, other sources

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