What is CVE-2026-33377?

CVE-2026-33377 is a high-severity vulnerability in Grafana, classified under Improper Authentication. CVSS score: 7.1/10. Published 2026-05-13.

How severe is CVE-2026-33377?

High severity. CVSS v3 base score is 7.1 out of 10.

Auth bypass in Grafana

CVE-2026-33377

An Editor can overwrite a dashboard not owned by them to acquire admin on that specific dashboard. The user must have write access to the dashboard to escalate privilege.

Vulnerability class: Broken Authentication

EPSS: 0.000 (2.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N.

Affected products

Grafana — versions 11.6.14, 12.2.8, 12.3.6
Grafana Oss — versions 8.5.0, 11.6.14, 12.0.0

Weakness classification (CWE)

CWE-287 — Improper Authentication
CWE-284 — Improper Access Control

References

security@grafana.com (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2026-33377?: CVE-2026-33377 is a high-severity vulnerability in Grafana, classified under Improper Authentication. CVSS score: 7.1/10. Published 2026-05-13.
How severe is CVE-2026-33377?: High severity. CVSS v3 base score is 7.1 out of 10.