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.
Analysis
Analysis and contextual insights are available on OpenCVE Cloud.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Grafana | Grafana OSS | unaffected |
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| Grafana | Elasticsearch Datasource | unaffected |
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| Grafana | Grafana Enterprise | unaffected |
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No data.
No data.
No data available yet.
No vendor fix or workaround currently provided.
Additional remediation guidance may be available on OpenCVE Cloud.
Tracking
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Thu, 12 Nov 2026 17:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Memory exhaustion denial of service in Elasticsearch data source index patterns | |
| Weaknesses | CWE-770 | |
| References |
| |
| Metrics |
cvssV3_1
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Subscriptions
No data.
MITRE
Status: PUBLISHED
Assigner: GRAFANA
Published:
Updated: 2026-11-12T17:40:38.085Z
Reserved: 2026-08-27T15:50:09.094Z
Link: CVE-2026-81843
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-11-12T18:17:53.470
Modified: 2026-11-12T18:17:53.470
Link: CVE-2026-81843
Redhat
No data.
OpenCVE Enrichment
No data.