Vulnerability · Published Aug 24, 2026 · Assigned by GRAFANA
CVE-2026-17033CVE-2026-17033 CVE Record
Medium 6.8
In plain English
A medium-severity cross-site scripting in Grafana OSS from Grafana. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 12% of all known vulnerabilities).
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Grafana | Grafana OSS | 0 – through 12.3.1112.4.0 – through 12.4.913.0.0 – through 13.0.7 |
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:L
References
- https://grafana.com/security/security-advisories/cve-2026-17033 vendor-advisory