CVE-2026-81841: 
Grafana vulnerability analysis and mitigation

CVE-2026-81841 is a missing authorization vulnerability in Grafana OSS and Grafana Enterprise affecting the shared (public) dashboard feature. When a shared dashboard is paused, its access token is not revoked for the frontend bootstrap data endpoints, allowing anyone with the dashboard link to retrieve data source configurations and stored credentials without authentication. The vulnerability was published on September 29, 2026, and affects Grafana versions 11.6.0–11.6.17, 12.0.0–12.0.10, 12.1.0–12.1.10, 12.2.0–12.2.11, 12.3.0–12.3.11, 12.4.0–12.4.11, 13.0.0–13.0.9, 13.1.0–13.1.6, and 13.2.0–13.2.2. It carries a CVSS v3.1 base score of 5.3 (Medium) (GitHub Advisory, Grafana Advisory).

The root cause is CWE-862 (Missing Authorization): when a shared dashboard is paused, Grafana fails to invalidate the associated access token for the API endpoints that serve frontend bootstrap data. An attacker who possesses the shared dashboard URL can send unauthenticated HTTP requests to these bootstrap endpoints and receive the full data source configuration, including stored credentials for data sources configured with browser-access mode. Notably, deleting the shared dashboard does properly revoke the token, confirming the flaw is specific to the pause operation's token lifecycle management (GitHub Advisory, Grafana Advisory).

Successful exploitation allows an unauthenticated attacker holding a paused shared dashboard link to retrieve the configuration of the dashboard's data sources, including stored credentials for data sources using browser access mode. This constitutes a confidentiality breach that could expose database passwords, API keys, or other sensitive credentials stored within Grafana data source configurations. While integrity and availability are not directly impacted, exposed credentials could enable lateral movement into backend systems connected to those data sources (GitHub Advisory, Grafana Advisory).

As of the disclosure date, there is no public proof-of-concept exploit and no evidence of in-the-wild exploitation (Grafana Advisory). The EPSS score is 0.0, reflecting low current exploitation probability. The vulnerability is automatable (no user interaction required) and requires no authentication, only possession of a paused shared dashboard URL. It has not been added to the CISA Known Exploited Vulnerabilities catalog.

1. Obtain the shared dashboard URL: Acquire the link to a Grafana shared (public) dashboard that has been paused — this could be obtained via phishing, accidental exposure, or prior access to the Grafana instance.
2. Identify bootstrap data endpoints: Using the shared dashboard token embedded in the URL, identify the frontend bootstrap API endpoints (e.g., /api/frontend/settings or similar bootstrap endpoints served to the shared dashboard context).
3. Send unauthenticated request: Issue an HTTP GET request to the bootstrap endpoint using the shared dashboard's access token, without providing any authentication credentials.
4. Retrieve data source configuration: Parse the response to extract data source configurations, including connection strings, usernames, passwords, or API keys stored for browser-accessible data sources.
5. Leverage exposed credentials: Use the harvested credentials to access backend data sources (databases, APIs, etc.) directly, enabling further lateral movement or data exfiltration (GitHub Advisory, Grafana Advisory).

• Network: Unauthenticated HTTP GET requests to Grafana frontend bootstrap endpoints (e.g., /api/frontend/settings, /api/ds/query) originating from unexpected IP addresses using a shared dashboard token associated with a paused dashboard.
• Logs: Grafana access logs showing requests to bootstrap/data source configuration endpoints with a shared dashboard token where the dashboard status is "paused"; repeated access from external or unknown IPs using the same token after the dashboard was paused.
• Application: Grafana audit logs (if enabled) recording data source configuration reads without an authenticated user session, attributed to a shared dashboard token.

Grafana has released patched versions addressing this vulnerability. Users should upgrade to: 11.6.18+, 12.0.11+, 12.1.11+, 12.2.12+, 12.3.12+, 12.4.12+, 13.0.10+, 13.1.7+, or 13.2.3+. As an immediate workaround, delete (rather than pause) shared dashboards that are no longer needed, since deletion properly revokes the access token. Additionally, review Grafana access logs for unauthorized access to paused shared dashboards, restrict dashboard sharing to trusted recipients, and audit data source credentials that may have been exposed (Grafana Advisory, GitHub Advisory).

The vulnerability was disclosed by Grafana's security team on September 29, 2026, with a corresponding GitHub Advisory (GHSA-4jjr-w7m9-wx5q) published the same day. Community tracking was noted on Bluesky and various CVE aggregator platforms shortly after disclosure. No significant independent researcher commentary or major media coverage has been identified beyond standard vulnerability database entries (GitHub Advisory, Grafana Advisory).