CVE-2026-81843: Grafana OSS · Unthrottled Resource Allocation
Affects Grafana OSSSource CVE Database V5
Not known to be exploited · CVSS 6.5 Medium : upgrade to 12.4.15 when convenient.
Data as of 12 Nov 2026, 17:49 UTC
Thin evidence
One scorer or none| CNA (GRAFANA) | CVSS 3.1 | 6.5 |
|---|
- Patch
- Available – fixed in 12.4.15, 12.9.6
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 12 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 12 Nov 2026.
What to do
Upgrade Grafana OSS and Grafana Enterprise to 12.4.15; Elasticsearch Datasource to 12.9.6.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| GrafanaGrafana OSS | Affected
| Fixed in
|
| GrafanaElasticsearch Datasource | Affected
| Fixed in
|
| GrafanaGrafana Enterprise | Affected
| Fixed in
|
AI-suggested
Upgrade Grafana OSS to version 12.4.15 or later, or 12.9.6 or later, where this vulnerability is fixed. No other mitigation is indicated. Users should ensure that data sources with time-based index patterns are updated to fixed versions to prevent resource exhaustion.
Description
A resource allocation vulnerability exists in Grafana OSS when using an Elasticsearch data source with a time-based index pattern. A user with query permissions, including those with only Viewer role, can submit a query with an extremely large time range, causing Grafana to generate many index names and allocate excessive memory. This allocation happens before any request is sent to Elasticsearch, potentially leading to server termination due to resource exhaustion. Data sources with static index names are not affected. The issue affects multiple versions of Grafana OSS and has been fixed in versions 12.4.15 and 12.9.6.