CVE WatchNov 12, 2026

CVE-2026-81843

Grafana is an open-source platform for monitoring and observability. When an Elasticsearch data source is configured with a time-based inde

CVSS

6.5

Medium

EPSS

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KEV

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Exploit Today

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0-100

Published: Nov 12, 2026 · Last modified: Nov 12, 2026 · CWE-770

EPSS · 30d

Not enough EPSS history yet.

Technical description

Grafana is an open-source platform for monitoring and observability. When an Elasticsearch data source is configured with a time-based index pattern, Grafana generated one index name for every interval in the requested query time range without any upper limit. A user with permission to query the data source, which includes users holding only the Viewer role in a default configuration, could submit a single small query with an extreme time range and cause the server to allocate memory until it was terminated. The allocation occurred before any request was sent to Elasticsearch, so the condition applied whether or not the Elasticsearch cluster was reachable. Data sources configured with a static index name are not affected.

Official references

grafana.comhttps://grafana.com/security/security-advisories/cve-2026-81843

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