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

Description (CNA)

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 (CNA)

Vendor / product	Versions
Grafana / Grafana Enterprise	affected 11.6.0 through 11.6.14; affected 12.2.0 through 12.2.8; affected 12.3.0 through 12.3.6; affected 12.4.0 through 12.4.3; affected 13.0.0 through 13.0.1
Grafana / Grafana OSS	affected 11.6.0 through 11.6.14; affected 12.2.0 through 12.2.8; affected 12.3.0 through 12.3.6; affected 12.4.0 through 12.4.3; affected 13.0.0 through 13.0.1

CWE

CWE-400

References

https://grafana.com/security/security-advisories/cve-2026-42127

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.