Grafana up to 12.3.11/12.4.9/13.0.7 Alert Details cross site scripting

Summaryinfo

A vulnerability was found in Grafana up to 12.3.11/12.4.9/13.0.7. It has been rated as problematic. Affected by this issue is some unknown functionality of the component Alert Details. This manipulation causes cross site scripting. This vulnerability is handled as CVE-2026-17033. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability has been found in Grafana up to 12.3.11/12.4.9/13.0.7 and classified as problematic. Affected by this vulnerability is an unknown function of the component Alert Details. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. The summary by CVE is:

An authenticated attacker with Editor access or alert.instances.external:write can submit an external Alertmanager alert containing a controlled generatorURL. The attacker is authorized to create the alert, but not to execute script in another user's Grafana session. Grafana renders alert.generatorURL directly as the Alert Details See source LinkButton href without URL-scheme sanitization or a safe-protocol allowlist. The click interceptor's :// heuristic can be bypassed by placing :// inside a JavaScript comment. When a user with read access clicks See source, the browser executes attacker-controlled JavaScript in the Grafana origin with the clicking user's permissions.

The advisory is shared at grafana.com. This vulnerability is known as CVE-2026-17033 since 07/24/2026. The exploitation appears to be easy. The attack can be launched remotely. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

• Grafana

Version

• 12.3.0
• 12.3.1
• 12.3.2
• 12.3.3
• 12.3.4
• 12.3.5
• 12.3.6
• 12.3.7
• 12.3.8
• 12.3.9
• 12.3.10
• 12.3.11
• 12.4.0
• 12.4.1
• 12.4.2
• 12.4.3
• 12.4.4
• 12.4.5
• 12.4.6
• 12.4.7
• 12.4.8
• 12.4.9
• 13.0.0
• 13.0.1
• 13.0.2
• 13.0.3
• 13.0.4
• 13.0.5
• 13.0.6
• 13.0.7

License

• open-source

CPE 2.3info

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CPE 2.2info

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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