CVE-2026-81843
Received
Received - Intake
Grafana Memory Exhaustion via Time-Based Index Pattern
Vulnerability report for CVE-2026-81843, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-11-12
Last updated on: 2026-11-12
Assigner: Grafana Labs
Description
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.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| Grafana | Grafana OSS | From 11.6.0 (inc) to 11.6.16 (inc) |
| Grafana | Grafana OSS | From 12.0.0 (inc) to 12.2.10 (inc) |
| Grafana | Grafana OSS | From 12.3.0 (inc) to 12.4.15 (exc) |
| Grafana | Elasticsearch Datasource | From 12.4.2 (inc) to 12.9.6 (exc) |
| Grafana | Grafana Enterprise | From 11.6.0 (inc) to 11.6.16 (inc) |
| Grafana | Grafana Enterprise | From 12.0.0 (inc) to 12.2.10 (inc) |
| Grafana | Grafana Enterprise | From 12.3.0 (inc) to 12.4.15 (exc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-770 | The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated. |
