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

Published · last modified .

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.

EPSS exploit prediction

EPSS: 0.002 (12.5th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 13th percentile — 12.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-33377: held from 0.002 to 0.002.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

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)

References

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.