---
id: CVE-2026-100644
title: >-
  SiYuan before v3.8.4 contains a SQL injection vulnerability in the graph query
  endpoint where the dailyNoteSavePath parameter is concatenated into SQL
  without escaping
summary: >-
  SiYuan before v3.8.4 contains a SQL injection vulnerability in the graph query
  endpoint where the dailyNoteSavePath parameter is concatenated into SQL
  without escaping. Unauthenticated attackers on published sites with auth
  disabled can …
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-89
vendor: siyuan-note
product: siyuan
affected:
  - siyuan < 3.8.4
published: '2026-09-26'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T16:16:57.890'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-100644'
references:
  - url: >-
      https://github.com/siyuan-note/siyuan/security/advisories/GHSA-xr4h-j7cg-q8pc
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/siyuan-before-3.8.4-sql-injection-via-dailynotesavepath
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/siyuan-note/siyuan/security/advisories/GHSA-xr4h-j7cg-q8pc
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-28T16:38:36.495700Z'
epss: 0.00433
epssPercentile: 0.37401
ingestedAt: '2026-09-26T13:33:20.920Z'
---

## Overview

SiYuan before v3.8.4 contains a SQL injection vulnerability in the graph query endpoint where the dailyNoteSavePath parameter is concatenated into SQL without escaping. Unauthenticated attackers on published sites with auth disabled can inject SQL via UNION SELECT to extract arbitrary database rows from all notebooks.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.