CVE-2026-76837 Baserow before 2.3.0 Stored Cross-Site Scripting via Rich Text Mention Display Name
Stored XSS in Baserow allows attackers to execute scripts in other users' browsers via malicious display names in rich-text mentions.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-76837?
CVE-2026-76837 is a medium-severity cross-site scripting vulnerability in Baserow, published on 24 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Baserow interpolates a user's display name into the rich-text mention markup without HTML encoding. PATCH /api/user/account/ stores the first_name value verbatim, and the mention renderer in web-frontend/modules/core/editor/mention.js builds its element with a template literal that places the name into a data-label attribute and the element body unescaped. A name containing a double quote closes that attribute and the opening tag, so following markup lands in the element content. The result is rendered through v-html by the rich-text field components, so any rich-text cell mentioning the account executes the stored script for every workspace member who views the table, without a click. Any workspace member, at the lowest permission level, can set the name and reach every other member of the workspace, and the payload persists until the name is changed or the mentioning row is removed. Version 2.3.0 escapes the value before interpolation.
Weakness: CWE-79
Which versions are affected by CVE-2026-76837?
How do I fix CVE-2026-76837?
No fix has been published for CVE-2026-76837 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-2026-76837 being exploited?
There is no known exploitation of CVE-2026-76837 in the wild and no public exploit code.
Sources
Also known as GHSA-6jjx-jh3j-cxqj.