CVE-2026-33387 Insufficient sanitization of Dashboards in Guardian/CMC before 26.3.0
Authenticated attackers can execute malicious code in victim browsers via template injection in Dashboards, modifying data or causing denial of service.
- 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
- None listed
What is CVE-2026-33387?
CVE-2026-33387 is a medium-severity code injection vulnerability in Nozomi Networks CMC, published on 8 Sep 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
A template injection vulnerability was discovered in the Dashboards functionality due to improper validation of an input parameter. An authenticated user with the required privileges can define a dashboard containing a malicious payload, or a victim can be socially engineered into importing a malicious dashboard. When the victim views or imports the dashboard, the payload executes in their browser context, allowing the attacker to modify application data or disrupt application availability.
Weakness: CWE-1336
Which versions are affected by CVE-2026-33387?
How do I fix CVE-2026-33387?
No fix has been published for CVE-2026-33387 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-33387 being exploited?
There is no known exploitation of CVE-2026-33387 in the wild and no public exploit code.
Sources
Also known as GHSA-xp2q-mg9h-jmmm.