Grafana Elasticsearch Datasource allocation of resources

Summaryinfo

A vulnerability marked as problematic has been reported in Grafana. This vulnerability affects unknown code of the component Elasticsearch Datasource. Performing a manipulation results in allocation of resources. This vulnerability is identified as CVE-2026-81843. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Grafana (the affected version is unknown). It has been classified as problematic. This affects an unknown code of the component Elasticsearch Datasource. The manipulation with an unknown input leads to a allocation of resources vulnerability. CWE is classifying the issue as 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. This is going to have an impact on availability. The summary by CVE is:

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.

The advisory is shared at grafana.com. This vulnerability is uniquely identified as CVE-2026-81843 since 08/27/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

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• Grafana

License

• open-source

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• 🔒

CPE 2.2info

• 🔒

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