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CVE-2026-39309— Trilium Notes: macOS TCC Bypass via Prompt Spoofing

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 Notes是Zadam个人开发者的一个分层笔记应用程序。专注于构建大型个人知识库。 Trilium Notes 0.102.1及之前版本存在安全漏洞，该漏洞源于Electron配置容易通过提示欺骗绕过TCC，可能导致本地攻击者利用恶意代码在受信任应用身份下触发误导性的macOS权限提示，从而访问TCC保护的资源如屏幕、摄像头、麦克风以及文件夹。

CVSS 5.5 · Medium EPSS 0.18% · P7

Possible ATT&CK Techniques 2 AI

T1157 T1055.021

Affected Version Matrix 1

VendorProduct Version RangeStatus
TriliumNext Trilium < 0.102.2 affected
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I. Basic Information for CVE-2026-39309

Vulnerability Information
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Vulnerability Title
Trilium Notes: macOS TCC Bypass via Prompt Spoofing
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. In versions 0.102.1 and prior, the Electron configuration is vulnerable to TCC Bypass via Prompt Spoofing, allowing local attackers to trigger misleading macOS permission prompts by running malicious code under the identity of the trusted app. The root cause is that the RunAsNode fuse allows launching the app in a special Node.js mode using -e to execute arbitrary system commands with Trilium Notes's permissions and identity. An attacker can leverage this through a subprocess to request any sensitive permissions, such as access to hardware (camera, microphone) and TCC-protected files, causing the TCC system prompt to appear as if the request came from Trilium rather than the attacker's code, because macOS treats the subprocess as part of the parent application. Exploitation allows access to TCC-protected resources like the screen, camera, microphone, and folders such as ~/Documents and ~/Downloads, undermining macOS's security model and UI integrity through social engineering. This issue has been fixed in version 0.102.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
关键信息的UI错误表达
Source: CVE Program / CVE List V5
Vulnerability Title
Trilium Notes 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Trilium Notes是Zadam个人开发者的一个分层笔记应用程序。专注于构建大型个人知识库。 Trilium Notes 0.102.1及之前版本存在安全漏洞，该漏洞源于Electron配置容易通过提示欺骗绕过TCC，可能导致本地攻击者利用恶意代码在受信任应用身份下触发误导性的macOS权限提示，从而访问TCC保护的资源如屏幕、摄像头、麦克风以及文件夹。
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 < 0.102.2 -

II. Public POCs for CVE-2026-39309

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III. Intelligence Information for CVE-2026-39309

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Vendor Advisories for CVE-2026-39309 (1)

Vendor Pages for CVE-2026-39309 (1)

IV. Related Vulnerabilities

Same product: Trilium
Same vendor: TriliumNext
Same weakness: CWE-451

V. Comments for CVE-2026-39309

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