# CVE-2026-76837: Baserow stored XSS via unescaped user display name in mentions

Source: https://junglewise.ai/threats/cve-2026-76837-baserow-stored-xss-via-unescaped-user-display-name-in-mentions  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-24. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-76837 · Severity: medium · CVSS 6.4 · Published 2026-08-24

Baserow is an open-source no-code database platform. A user's display name is rendered directly into rich-text mention elements without HTML encoding, allowing any workspace member to inject malicious JavaScript. This stored script executes automatically for all other members viewing that row, without requiring a click, and persists until the user's name is changed or the row is deleted. An attacker needs only basic workspace access to compromise all other members of the workspace.

Technologies: [Baserow](https://junglewise.ai/threats/technologies/baserow). Vendors: [Baserow](https://junglewise.ai/threats/vendors/baserow).

## Quick answers

**Is CVE-2026-76837 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-76837 being exploited in the wild.

**How severe is CVE-2026-76837?** Medium severity, with a CVSS score of 6.4, published 24 August 2026.

**Which products and versions are affected?** Baserow before 2.3.0.

**Is there a fix for CVE-2026-76837?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-76837 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-76837?** Check whether you run Baserow at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is a stored cross-site scripting (XSS) flaw in the mention rendering logic. The web-frontend/modules/core/editor/mention.js file uses a template literal to construct mention markup, interpolating the user's display name (first_name field) into a data-label attribute and element body without HTML encoding. The PATCH /api/user/account/ endpoint stores the first_name value verbatim without sanitization. A display name containing a double quote can break out of the attribute and opening tag, injecting arbitrary markup. Since the resulting markup is rendered via v-html in rich-text field components, any injected script executes in the browser context of all workspace members viewing the table. Any workspace member, even at the lowest permission level, can modify their own display name and reach all other members in the workspace. The vulnerability was patched in version 2.3.0, which escapes the value before interpolation.

## Affected products

- Baserow Baserow before 2.3.0

## Timeline

- 2026-08-24: disclosed

## References

- [https://github.com/baserow/baserow](https://github.com/baserow/baserow)
- [https://github.com/baserow/baserow/blob/2.2.2/web-frontend/modules/core/editor/mention.js](https://github.com/baserow/baserow/blob/2.2.2/web-frontend/modules/core/editor/mention.js)

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