High severity · published Jun 22, 2026
CVE-2026-42127
Pre-authentication denial of service in the public dashboard query endpoint
7.5
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 37% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GR
Grafana · Grafana
11.6.0 through 11.6.14; 12.2.0 through 12.2.8; 12.3.0 through 12.3.6; 12.4.0 through 12.4.3; 13.0.0 through 13.0.1 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-42127
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-42127
Broken Link
https://grafana.com/security/security-advisories/cve-2026-42127
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