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CVE-2026-47666— Penpot: Stored XSS via custom font family name injected into a @font-face style rule

Quick assessment

Affected
penpot penpot
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.

Penpot 是一个开源的设计与原型制作平台。在 2.14.3 及更早的版本中，Penpot 存在通过自定义字体族名称触发的存储型跨站脚本（Stored XSS）漏洞。具体而言，字体族名称会被直接插入到 CSS 规则中，并未经过任何清理（sanitization）就以 HTML 形式注入页面。由于后端接受任意字符串作为字体族名称，而前端通过 写入生成的样式，如果名称中包含诸如闭合的 标签后接 等标记，攻击者即可跳出当前的 元素，从而在 Penpot 域下执行 JavaScript 代码。该攻击是被动式的：任何打开引

CVSS 7.6 · High
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I. Basic Information for CVE-2026-47666

Vulnerability Information
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Vulnerability Title
Penpot: Stored XSS via custom font family name injected into a @font-face style rule
Source: CVE Program / CVE List V5
Vulnerability Description
Penpot is an open-source design and prototyping platform. In versions up to and including 2.14.3, Penpot is vulnerable to stored cross-site scripting through custom font family names, which are interpolated into a @font-face CSS rule and injected into the page as HTML without sanitization. Because the backend accepts an arbitrary font-family string and the frontend writes the resulting style through innerHTML, a name containing markup such as a closing style tag followed by a script can break out of the style element and execute JavaScript on the Penpot origin. The attack is passive: any team member who opens a file referencing the malicious font triggers script execution simply by rendering the page, allowing theft of session cookies, actions performed as the victim, and access to their files and projects. This issue is fixed in version 2.15.3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/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
penpot penpot < 2.15.3 -

II. Public POCs for CVE-2026-47666

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III. Intelligence Information for CVE-2026-47666

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Patches & Fixes for CVE-2026-47666 (1)

Vendor Advisories for CVE-2026-47666 (1)

IV. Related Vulnerabilities

Same product: penpot
Same vendor: penpot
Same weakness: CWE-79

V. Comments for CVE-2026-47666

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