Improper access control in Grafana - CVE-2026-33380

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Main Vulnerability Database Vulnerabilities #VU131640

Improper access control in Grafana - CVE-2026-33380

Published: May 18, 2026


Vulnerability identifier: #VU131640
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-33380
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: Grafana Labs
Affected software:
Grafana

Detailed vulnerability description

The vulnerability allows a remote user to disclose sensitive information.

The vulnerability exists due to improper access control in SQL Expressions when evaluating user-supplied SQL expressions. A remote user can read arbitrary files from the server filesystem to disclose sensitive information.

Only instances with the sqlExpressions feature toggle enabled are vulnerable.


How to mitigate CVE-2026-33380

Install security update from vendor's website.

Sources