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CVE-2026-53580— Trilium arbitrary file read and denial of service via file:// URLs in the automatic image-download feature

Quick assessment

Affected
TriliumNext Trilium
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.

Trilium Next Trilium Notes是Trilium Next组织的一款支持文档管理与项目管理的工具。 Trilium Next Trilium Notes 0.104.0之前版本存在安全漏洞，该漏洞源于自动图片下载功能接受file:// URL且未对路径进行验证，允许经过身份验证的用户泄露任意文件；同时指向无界资源时导致内存分配不受控制，造成服务器崩溃。

CVSS 8.1 · High EPSS 0.52% · P43

Affected Version Matrix 1

VendorProduct Version RangeStatus
TriliumNext Trilium < 0.104.0 affected
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I. Basic Information for CVE-2026-53580

Vulnerability Information
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Vulnerability Title
Trilium arbitrary file read and denial of service via file:// URLs in the automatic image-download feature
Source: CVE Program / CVE List V5
Vulnerability Description
Trilium is an open-source hierarchical note-taking application. In versions prior to 0.104.0, the automatic image-download feature accepts file:// URLs in a note's img tags and reads the referenced local file with no path validation, allowing any authenticated user to disclose arbitrary files readable by the Trilium process. When a text note is saved, Trilium scans its HTML for image sources and downloads each external one; because the HTML sanitizer keeps file as an allowed scheme, a source such as file:///etc/passwd is passed straight to a filesystem read and its contents are stored as a note attachment the user can then retrieve. Pointing the same primitive at an unbounded source such as /dev/zero causes uncontrolled memory allocation that crashes the server process. The feature is enabled by default and is reachable through the web UI, the ETAPI, the web clipper, and note imports, requiring only an authenticated session or an ETAPI token. This issue is fixed in version 0.104.0
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
文件名或路径的外部可控制
Source: CVE Program / CVE List V5
Vulnerability Title
Trilium Next Trilium Notes 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Trilium Next Trilium Notes是Trilium Next组织的一款支持文档管理与项目管理的工具。 Trilium Next Trilium Notes 0.104.0之前版本存在安全漏洞，该漏洞源于自动图片下载功能接受file:// URL且未对路径进行验证，允许经过身份验证的用户泄露任意文件；同时指向无界资源时导致内存分配不受控制，造成服务器崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
TriliumNext Trilium < 0.104.0 -

II. Public POCs for CVE-2026-53580

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III. Intelligence Information for CVE-2026-53580

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Patches & Fixes for CVE-2026-53580 (1)

Vendor Advisories for CVE-2026-53580 (1)

Same Patch Batch · TriliumNext · 2026-08-27 · 6 CVEs total

CVE-2026-53578 9.3 CRITICAL Trilium: Note Import to RCE via Mind Elixir dangerouslySetInnerHtml
CVE-2026-53579 9.3 CRITICAL Trilium: Note Import to RCE via Book Note
CVE-2026-48996 9.3 CRITICAL Trilium: Malicious import with GeoMap marker title XSS leads to RCE on the desktop client
CVE-2026-47727 8.6 HIGH Trilium: RCE via `shareTemplate` relation missing `isDangerous` flag — Safe import bypass
CVE-2026-77438 7.5 HIGH Trilium unauthenticated share-search discloses password-protected and hidden shared notes

IV. Related Vulnerabilities

Same product: Trilium
Same vendor: TriliumNext
Same weakness: CWE-73

V. Comments for CVE-2026-53580

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