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CVE-2026-45733— Trilium: Stored XSS in note icon rendering leads to Remote Code Execution in Electron desktop app

Quick assessment

Affected
TriliumNext Trilium
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Trilium Notes 是一款跨平台的层级式笔记应用程序，专注于构建大型个人知识库。在 0.103.0 版本之前， 函数会原始返回 标签的值，并将其未经 HTML 属性编码直接插入到 和 中的 class 属性中。这使得攻击者可以通过存储恶意有效载荷（payload），在受害者打开新标签页或使用 Ctrl+J 快捷键时自动执行该代码。此外，由于 Electron 启用了 并禁用了 ，恶意代码还可以以受害者身份执行操作系统命令。此问题已在 0.103.0 版本中修复。

CVSS 8.3 · High EPSS 0.30% · P22

Affected Version Matrix 1

VendorProduct Version RangeStatus
TriliumNext Trilium < 0.103.0 affected
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I. Basic Information for CVE-2026-45733

Vulnerability Information
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Vulnerability Title
Trilium: Stored XSS in note icon rendering leads to Remote Code Execution in Electron desktop app
Source: CVE Program / CVE List V5
Vulnerability Description
Trilium Notes is a cross-platform, hierarchical note taking application focused on building large personal knowledge bases. Prior to 0.103.0, the #iconClass label value is returned raw by getNoteIcon() and inserted without HTML attribute encoding into class attributes in apps/client/src/widgets/quick_search.ts and apps/client/src/services/note_autocomplete.ts, allowing a stored payload to execute automatically when a victim opens a new tab or uses Ctrl+J and, because Electron enables nodeIntegration and disables contextIsolation, run operating-system commands as the victim. This issue is fixed in version 0.103.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:L
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
TriliumNext Trilium < 0.103.0 -

II. Public POCs for CVE-2026-45733

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 7822 chars
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III. Intelligence Information for CVE-2026-45733

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Vendor Advisories for CVE-2026-45733 (1)

Vendor Pages for CVE-2026-45733 (1)

IV. Related Vulnerabilities

Same product: Trilium
Same vendor: TriliumNext
Same weakness: CWE-79

V. Comments for CVE-2026-45733

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