CVE-2026-21722: Medium Vulnerability in Grafana Grafana

CVE-2026-21722 is a medium-severity vulnerability affecting Grafana, identified on February 12, 2026. This vulnerability allows public dashboards with annotations enabled to expose annotation history beyond the intended locked time range. Attackers may leverage this flaw to view the entire history of annotations visible on the specific dashboard, presenting a risk to data confidentiality. The CVSS score for this vulnerability is 5.3, indicating a medium severity level that organizations should not overlook.

Risk to organizations includes unauthorized access to sensitive annotations that may impact decision-making and operational integrity. Given the low attack complexity and no privileges required, exploitation becomes feasible for various threat actors. Therefore, organizations should prioritize patching immediately.

Currently, there is no known public exploit, and Grafana has not included this vulnerability in their known exploitation (KEV) catalog. However, the lack of a public exploit does not diminish the importance of addressing this vulnerability. Organizations should address this vulnerability in their priority patch cycle to ensure their systems remain secure.

Organizations utilizing Grafana should assess the impact of this vulnerability on their public dashboards and take appropriate measures to mitigate potential risks. Regular security assessments can help identify similar weaknesses in their systems.

Vulnerability Details

The vulnerability is characterized by a failure to restrict the annotation timerange of public dashboards to the locked timerange. This oversight can lead to the exposure of annotation histories that should remain confidential. As stated in the CVE description, this does not leak any annotations that would not otherwise be visible on the public dashboard.

The CVSS 3.1 score for this vulnerability is 5.3, which indicates a medium severity level due to its potential impact on confidentiality. The attack vector for this vulnerability is network-based, with low attack complexity, requiring no privileges or user interaction. The confidentiality impact is rated as low, while integrity and availability impacts are rated as none.

The affected product is Grafana, with specific versions vulnerable including 9.3.0 through 11.6.10, 12.0.0 through 12.1.6, 12.2.0 through 12.2.4, and 12.3.0 through 12.3.2. Organizations should review their deployments to identify if they are using any of these versions.

Technical Analysis

The root cause of CVE-2026-21722 stems from insufficient restrictions on the annotation timerange for public dashboards. This design flaw allows unauthorized access to annotation histories that should be limited to specific time intervals. The attack vector is network-based, allowing attackers to exploit this vulnerability remotely.

The vulnerability requires no privileges, and user interaction is not needed, making it easier for potential attackers to exploit. The confidentiality impact is rated low, as the annotations that can be accessed are those already visible on the public dashboard, but the exposure of historical data can still pose a risk.

Overall, while the integrity and availability impacts are rated as none, the risk to confidentiality and potential for misuse of exposed data warrant immediate attention from organizations using affected versions of Grafana.

Risk & Impact Analysis

The deployment of affected versions of Grafana poses a real-world risk, particularly for organizations that use public dashboards to share data with stakeholders. The potential for unauthorized access to the annotation history can lead to data exposure, impacting the confidentiality of sensitive information.

This vulnerability highlights the importance of proper access controls and restrictions in publicly accessible applications. Organizations must understand the implications of this vulnerability and prioritize remediation efforts to minimize exposure.

Given the medium CVSS score and the fact that it is not included in the KEV catalog, organizations should address this vulnerability in their priority patch cycle. The urgency for remediation is moderate, as the risks associated with this vulnerability can have a significant impact on organizational integrity.

Affected Versions

The vulnerability impacts all Grafana versions from 9.3.0 to 11.6.10, as well as versions 12.0.0 to 12.1.6, 12.2.0 to 12.2.4, and 12.3.0 to 12.3.2. Organizations utilizing these versions should take immediate steps to upgrade to patched versions.

Mitigation & Remediation

Grafana has released patches to address this vulnerability. Organizations should upgrade to the latest version of Grafana to ensure that they are not vulnerable to exploitation. If immediate patching is not possible, implementing access controls to limit public dashboard visibility is recommended as a temporary measure.

Additionally, organizations can enhance their security posture through penetration testing to identify potential weaknesses in their configurations.

Detection Guidance

Organizations should monitor logs for unusual access patterns to public dashboards. Behavioral anomalies, such as access attempts to annotations outside the locked timerange, should be flagged for review. Additionally, network signatures can be established to detect potential exploitation attempts.

AppSecure Threat Intelligence Insight

CVE-2026-21722 represents a significant threat to organizations using Grafana, especially those relying on public dashboards to share critical data. The vulnerability underscores the necessity for robust security practices, particularly in the configuration of public-facing applications. Understanding the patterns of how such vulnerabilities emerge can help security teams to better anticipate and mitigate future risks.

Organizations should consider implementing a comprehensive vulnerability management program to regularly assess and address vulnerabilities within their environments.

As organizations adapt to the evolving threat landscape, it is crucial to incorporate lessons learned from incidents like CVE-2026-21722 into their security frameworks. Engaging in penetration testing methodologies can also provide insights into potential vulnerabilities before they are exploited.

Ultimately, the goal is to establish a proactive security posture that not only addresses current vulnerabilities but also anticipates future threats.