Resource exhaustion in Grafana
CVE-2026-42127
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.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (35.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 35.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Grafana
- Grafana Enterprise — versions 13.0.0, 12.4.0, 12.3.0
- Grafana Oss — versions 11.6.0, 12.2.0, 12.3.0
Weakness classification (CWE)
References
- grafana.com/security/security-advisories/cve-2026-42127 (vendor-advisory, Broken Link)
Frequently asked questions
- What is CVE-2026-42127?
- CVE-2026-42127 is a high-severity vulnerability in Grafana, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-06-22.
- How severe is CVE-2026-42127?
- High severity. CVSS v3 base score is 7.5 out of 10.