# CVE-2026-42127: Pre-authentication denial of service in the public dashboard query endpoint

> CVE-2026-42127: Pre-authentication denial of service in the public dashboard query endpoint. CVSS 7.5 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-42127
Last updated: 2026-08-27T17:22:36Z

- Published: 2026-06-22 16:31 UTC · Updated: 2026-08-27 17:22 UTC · Assigner: GRAFANA
- CVSS: 7.5 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS: 0.43%, 37th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-400

## Description

The public dashboard query endpoint does not limit request body size before processing, allowing unauthenticated attackers to trigger excessive memory allocation by sending arbitrarily large JSON payloads. This can lead to denial of service through memory exhaustion. No valid dashboard access token or authentication is required to exploit this vulnerability.

## Affected vendors and products

- Grafana: Grafana Enterprise
- Grafana: Grafana OSS

## Tracked companies

- [Grafana Cloud](https://rewindex.com/company/grafana-cloud.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-42127)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-42127)
- [https://grafana.com/security/security-advisories/cve-2026-42127](https://grafana.com/security/security-advisories/cve-2026-42127)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-42127 · Markdown: https://rewindex.com/cve/CVE-2026-42127.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-42127 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:13:03.964Z