CVE-2026-84701 NocoBase Rich Text Field Stored Cross-Site Scripting via API
Attackers with create permissions can inject malicious HTML into rich text fields, executing scripts in other users' browsers via the API.
- 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-2026-84701?
CVE-2026-84701 is a medium-severity cross-site scripting vulnerability in nocobase, published on 2 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
NocoBase fails to sanitize rich text field values in the read renderer, allowing users with create permissions to store malicious HTML with event handlers. Attackers can write arbitrary markup through the collection API that executes in the browsers of all users viewing the affected record.
Weakness: CWE-79
Which versions are affected by CVE-2026-84701?
How do I fix CVE-2026-84701?
No fix has been published for CVE-2026-84701 yet. Limit exposure of the affected software until one is available.
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-2026-84701 being exploited?
There is no known exploitation of CVE-2026-84701 in the wild and no public exploit code.
Sources
Also known as GHSA-9mv7-8vhm-9hc5.