Critical Security Update for Grafana: Privilege Escalation and Denial of Service Vulnerabilities
Summary
ALSA-2026:54243: Important: grafana security update. Affects grafana versions < 9.2.10-32.el8_10.1. Fixed in 9.2.10-32.el8_10.1. How to fix ↓
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Background
Grafana is an open-source analytics and monitoring platform that allows users to visualize and analyze data from various sources such as Graphite, InfluxDB, and OpenTSDB. It is widely used for creating dashboards and graphs, making it a critical tool for data-driven decision-making in many organizations. However, recent vulnerabilities have been identified that could compromise the security and stability of Grafana installations.
Vulnerability Detail
The vulnerabilities in Grafana include a privilege escalation issue that allows unauthorized users to overwrite dashboards (CVE-2026-33377) and a denial of service vulnerability caused by excessive memory allocation when processing large JSON payloads (CVE-2026-42127). These vulnerabilities can lead to unauthorized access to sensitive data and service interruptions, severely impacting the functionality of applications relying on Grafana.
How To Fix
Minimum fixed version
9.2.10-32.el8_10.1
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, consider limiting the size of JSON payloads processed by Grafana to prevent denial of service. Additionally, review user permissions to mitigate the risk of privilege escalation until the update can be applied.
Conclusion
The identified vulnerabilities in Grafana pose significant risks, including unauthorized access and service disruptions. It is crucial for users to update to the latest patched version to safeguard their installations. Implementing workarounds can provide temporary relief until the update is applied.
See every vulnerability recorded for grafana →
FAQ
The main vulnerabilities are privilege escalation via dashboard overwrite and denial of service due to excessive memory allocation from large JSON payloads.
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, implement the suggested workarounds to limit JSON payload sizes and review user permissions.
For detailed information about the CVSS score and impact of the vulnerabilities, refer to the CVE pages linked in the advisory.
You can find more information about Grafana security updates on the official Grafana website and GitHub repository.
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