Critical Security Update for Grafana: Information Disclosure and Denial of Service Vulnerabilities
Summary
ALSA-2026:19134: Important: grafana security update. Affects grafana versions < 10.2.6-26.el10_2. Fixed in 10.2.6-26.el10_2. How to fix ↓
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Background
Grafana is an open-source analytics and monitoring platform that allows users to visualize and analyze metrics from various data sources such as Graphite, InfluxDB, and OpenTSDB. It is widely used for creating dashboards and graphs to monitor system performance and health. However, recent vulnerabilities have been identified that could compromise the security of data sources and lead to denial of service attacks.
Vulnerability Detail
The vulnerabilities identified in Grafana include information disclosure of data-source passwords through public dashboards (CVE-2026-27877), a potential root privilege escalation due to improper handling of symlinks in the golang internal syscall (CVE-2026-32282), and a denial of service vulnerability that can be triggered by sending multiple TLS 1.3 key update messages (CVE-2026-32283). These issues could allow unauthorized access to sensitive information and disrupt service availability.
How To Fix
Minimum fixed version
10.2.6-26.el10_2
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, consider restricting access to public dashboards that may expose sensitive data until the update can be applied. Additionally, review and limit the permissions of users who can create or modify dashboards.
Conclusion
In summary, Grafana has critical vulnerabilities that require immediate attention. Updating to the latest patched version is essential to protect against information disclosure and denial of service attacks. Utilize tools like Vulert to stay informed about vulnerabilities in your software.
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FAQ
CVE-2026-27877 refers to a vulnerability in Grafana that allows information disclosure of data-source passwords via 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.
Failure to address these vulnerabilities could lead to unauthorized access to sensitive data and potential service disruptions.
Yes, Vulert can monitor and alert you in real-time for open-source vulnerabilities using just a manifest file like package-lock.json.
If an immediate update is not possible, implement access restrictions to sensitive dashboards and monitor for any unusual activity.
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