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CVE-2026-76837— Baserow before 2.3.0 Stored Cross-Site Scripting via Rich Text Mention Display Name

Quick assessment

Affected
Baserow Baserow
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Baserow 在将用户的显示名称插入富文本提及标记时，未进行 HTML 实体编码。 接口以原始形式存储 的值，而 Web 前端模块 中的提及渲染器使用模板字面量构建元素，将用户名直接赋值给 属性和元素主体，均未进行转义。如果用户名包含双引号（"），则会闭合该属性及 HTML 开始标签，使得后续的任何标记都成为元素内容的一部分。由于富文本字段组件通过 渲染这些内容，因此，任何在表格中提及该账户的富文本单元格都会在执行时自动执行存储的脚本，无需用户点击，且所有工作区成员在查看该表格时都会触发此脚本执行。任何工作区成员

CVSS 6.4 · Medium
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I. Basic Information for CVE-2026-76837

Vulnerability Information
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Vulnerability Title
Baserow before 2.3.0 Stored Cross-Site Scripting via Rich Text Mention Display Name
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Baserow Baserow 0 ~ 2.3.0 -

II. Public POCs for CVE-2026-76837

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III. Intelligence Information for CVE-2026-76837

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Patches & Fixes for CVE-2026-76837 (2)

Other References for CVE-2026-76837 (3)

IV. Related Vulnerabilities

Same product: Baserow
Same weakness: CWE-79

V. Comments for CVE-2026-76837

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