CVE-2026-17183
Received Received - Intake

Authentication Bypass in Grafana Alert Rule Datasource Query

Publication date: 2026-08-19

Last updated on: 2026-08-19

Assigner: Grafana Labs

Description
An authenticated user with permission to create or edit alert rules can bypass datasource query authorization by marking an alert rule query as a server-side expression while referencing a real datasource UID (incorrect authorization). This can expose data accessible through Grafana's configured datasource credentials to users who lack permission to query that datasource.

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Meta Information

Published
2026-08-19
Last Modified
2026-08-19
Generated
2026-08-19
AI Q&A
2026-08-19
EPSS Evaluated
N/A
NVD
CVE-2026-17183
EUVD
EUVD-2026-62597

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
grafana grafana_oss 13.0.1
grafana grafana *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-863 The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

Attack-Flow Graph

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Executive Summary

This vulnerability allows an authenticated low-privileged user in Grafana to bypass datasource query permissions. By setting a malicious queryType field to __expr__ and referencing a restricted datasource UID, the attacker tricks Grafana into executing the query using the datasource's credentials despite lacking direct permission.

Impact Analysis

An attacker could access sensitive data exposed by the targeted datasource, leading to unauthorized information disclosure. While integrity impact is low, some backends may allow state-changing operations. No availability impact has been observed.

Compliance Impact

This vulnerability could lead to unauthorized data access, violating confidentiality requirements in GDPR and HIPAA. High confidentiality impact means organizations may fail compliance audits if exploited.

Mitigation Strategies

Update Grafana OSS to the latest patched version. Disable alert-rule editing permissions for low-privileged users until patched. Review and restrict datasource UID exposure in alert rules. Monitor for unauthorized query execution attempts in logs.

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