Critical Security Flaw in Grafana: Information Disclosure of Data-Source Passwords
Summary
RLSA-2026:10223: Important: grafana security update. Affects grafana versions < 0:10.2.6-24.el10_1. Fixed in 0:10.2.6-24.el10_1. How to fix ↓
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Background
Grafana is an open-source platform designed for monitoring and visualizing metrics from various data sources such as Graphite, InfluxDB, and OpenTSDB. It provides a rich dashboard and graph editor that allows users to create and share dynamic visualizations of their data. However, a recent vulnerability has been identified that could expose sensitive information, specifically data-source passwords, through public dashboards, potentially compromising the security of the systems that rely on Grafana.
Vulnerability Detail
The vulnerability identified as CVE-2026-27877 allows for information disclosure of data-source passwords via public dashboards in Grafana. This issue arises when sensitive credentials are inadvertently exposed to unauthorized users through publicly accessible dashboards. The ramifications of this vulnerability are significant, as it could lead to unauthorized access to data sources, data manipulation, or further exploitation of the system. The CVSS score for this vulnerability is 7.5, indicating a high severity level.
How To Fix
Minimum fixed version
0:10.2.6-24.el10_1
This is the first release that contains the fix.
sudo dnf update grafanaTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, it is advisable to restrict access to public dashboards that may contain sensitive information. This can be achieved by adjusting the permissions and visibility settings within Grafana to ensure that only authorized users can view dashboards that display sensitive data.
Conclusion
The Grafana vulnerability CVE-2026-27877 poses a significant risk by allowing the disclosure of sensitive data-source passwords through public dashboards. It is crucial for users to update to the patched version to mitigate this risk and ensure the security of their systems. Additionally, implementing temporary workarounds can help protect sensitive information until an update can be applied.
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FAQ
CVE-2026-27877 is a vulnerability in Grafana that allows unauthorized users to access sensitive data-source passwords through public dashboards.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
If an immediate update is not possible, ensure that sensitive dashboards are not publicly accessible and review user permissions to mitigate risks.
The potential impacts include unauthorized access to data sources, data manipulation, and increased risk of further exploitation of the system.
More information can be found on the CVE page for CVE-2026-27877, which details the security issue and its implications.
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