Critical Security Update for Grafana: Information Disclosure and Denial of Service Vulnerabilities
Summary
ALSA-2026:19352: Important: grafana security update. Affects grafana versions < 10.2.6-22.el9_8. Fixed in 10.2.6-22.el9_8. How to fix ↓
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Background
Grafana is an open-source, feature-rich metrics dashboard and graph editor designed for visualizing time series data from various sources such as Graphite, InfluxDB, and OpenTSDB. It allows users to create dynamic dashboards and monitor metrics in real-time. However, recent vulnerabilities have been identified that could compromise data security and system stability.
Vulnerability Detail
The vulnerabilities in Grafana include an information disclosure issue where data-source passwords can be exposed through public dashboards (CVE-2026-27877). Additionally, there is a potential for denial of service due to multiple TLS 1.3 key update messages (CVE-2026-32283). These vulnerabilities can lead to unauthorized access to sensitive information and disrupt service availability, posing significant risks to users and organizations relying on Grafana for monitoring.
How To Fix
Minimum fixed version
10.2.6-22.el9_8
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 measure, consider restricting access to public dashboards and ensuring that sensitive data-source passwords are not exposed. Implementing strict access controls and monitoring can help mitigate risks until the update is applied.
Conclusion
The identified vulnerabilities in Grafana pose significant risks, including information disclosure and denial of service. It is crucial for users to update to the latest patched version to safeguard their systems. Implementing best practices for security and utilizing tools like Vulert can further enhance protection against such vulnerabilities.
See every vulnerability recorded for grafana →
FAQ
The vulnerabilities involve information disclosure of data-source passwords and a denial of service risk due to improper handling of TLS 1.3 key updates.
You can use the Vulert platform to monitor and alert for open-source vulnerabilities. Visit Vulert Scanner to check if your application is affected without needing to sign up.
If an immediate update is not possible, restrict access to public dashboards and review your security settings to minimize exposure.
While specific exploits may not be publicly disclosed, the nature of the vulnerabilities suggests that they could be exploited to gain unauthorized access or disrupt services.
The recommended version to upgrade to is 10.2.6-22.el9_8, which includes the necessary security patches.
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