Is there a public exploit for CVE-2026-81843?

No public exploit for CVE-2026-81843 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-81843?

CVE-2026-81843 scores CVSS 6.5 (v3.1), rated medium.

What does CVE-2026-81843 affect?

CVE-2026-81843 affects Grafana Grafana Enterprise, Grafana OSS, Elasticsearch Datasource.

6.5 Medium

Grafana is an open-source platform for monitoring and observability.

CVE-2026-81843

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.

Assessment

CVSS: 6.5 (v3.1)
Severity: Medium
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 12 November 2026
Last updated: 12 November 2026
Affected: Grafana · Elasticsearch Datasource · Grafana Enterprise · Grafana OSS
Assigner: GRAFANA

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

At the source

EUVD (ENISA)

References

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

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