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CVE-2026-115762— draw.io: Prototype pollution in GraphML (mxGraphMlCodec)

Quick assessment

Affected
jgraph drawio
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.

draw.io 是一款可配置的图表绘制与白板应用。在 31.1.5 版本之前，其 GraphML 解码器存在原型污染漏洞。攻击者可控制的 GraphML 引用键能够访问继承的对象属性（包括原型对象），解码器随后会将攻击者控制的属性赋值给这些对象。导入恶意的 GraphML 文件可触发客户端原型污染。在公告中描述的组合跨站脚本（XSS）攻击链中，编辑器会以 Trello 模式打开，用户在导入文件后调用 Trello 集成功能，从而在 draw.io 的源上下文中执行脚本；此攻击无需预先建立 Trello 连接。该漏洞

CVSS 6.1 · Medium
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I. Basic Information for CVE-2026-115762

Vulnerability Information
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Vulnerability Title
draw.io: Prototype pollution in GraphML (mxGraphMlCodec)
Source: CVE Program / CVE List V5
Vulnerability Description
draw.io is a configurable diagramming and whiteboarding application. Prior to 31.1.5, the GraphML decoder contains a prototype-pollution vulnerability. Attacker-controlled GraphML reference keys can address inherited object properties, including prototype objects, and the decoder can then assign attacker-controlled attributes to those objects. Importing a malicious GraphML file can trigger client-side prototype pollution. In the advisory-supported cross-site scripting chain, the editor is opened in Trello mode and the user invokes the Trello integration after the import, allowing the polluted state to execute script in the draw.io origin; an existing Trello connection is not required. This vulnerability is fixed in 31.1.5.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1321
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
jgraph drawio < 31.1.5 -

II. Public POCs for CVE-2026-115762

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III. Intelligence Information for CVE-2026-115762

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Other References for CVE-2026-115762 (2)

IV. Related Vulnerabilities

Same product: drawio
Same vendor: jgraph
Same weakness: CWE-1321