CVE-2026-17033 CVE-2026-17033 CVE Record
An authenticated attacker can inject JavaScript via a crafted alert URL, leading to code execution in another user's Grafana session.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-17033?
CVE-2026-17033 is a medium-severity cross-site scripting vulnerability in Grafana OSS, published on 24 Aug 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
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.
Weakness: CWE-79
Which versions are affected by CVE-2026-17033?
1 open source package ship an affected version, including grafana.
| Package | Affected | Fixed in |
|---|---|---|
grafana Bitnami | All versions | 12.4.10, 13.1.0 |
How do I fix CVE-2026-17033?
Upgrade grafana to a fixed version for your release line: 12.4.10 or 13.1.0.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-17033 being exploited?
There is no known exploitation of CVE-2026-17033 in the wild and no public exploit code.
Sources
Also known as BIT-grafana-2026-17033, GHSA-7vc5-9278-236p, MINI-2h5p-vfr5-qcg9, MINI-2x32-h5gr-hf52, MINI-3fc9-fp29-3g6p, MINI-3m7h-g7jx-84pq and 12 more.