---
id: CVE-2026-87808
title: >-
  SiYuan versions <= 3.8.1 contain an incomplete fix for CVE-2026-32767
  (GHSA-j7wh-x834-p3r7)
summary: >-
  SiYuan versions <= 3.8.1 contain an incomplete fix for CVE-2026-32767
  (GHSA-j7wh-x834-p3r7). The prior fix (commit d5e2d0bc) added an administrator
  check for SQL mode (method=2) in POST /api/search/fullTextSearchBlock, but the
  endpoint s…
severity: medium
cvss: 4.9
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-693
vendor: siyuan-note
product: siyuan
affected:
  - siyuan < 3.8.2
published: '2026-09-09'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T20:20:21.673'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-87808'
references:
  - url: >-
      https://github.com/siyuan-note/siyuan/commit/d5e2d0bce0dffef5f61bd8066954bc2d41181fc5
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/siyuan-note/siyuan/security/advisories/GHSA-4qwm-3p58-vh67
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/siyuan-before-3.8.2-read-only-boundary-bypass-via-fulltextsearchblock
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/siyuan-note/siyuan/security/advisories/GHSA-4qwm-3p58-vh67
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-09T14:04:58.729512Z'
ingestedAt: '2026-09-10T20:48:33.708Z'
epss: 0.00324
epssPercentile: 0.25688
---

## Overview

SiYuan versions <= 3.8.1 contain an incomplete fix for CVE-2026-32767 (GHSA-j7wh-x834-p3r7). The prior fix (commit d5e2d0bc) added an administrator check for SQL mode (method=2) in POST /api/search/fullTextSearchBlock, but the endpoint still does not enforce the application's read-only boundary: for method=2 it forwards caller-supplied SQL to the blocks database query path without calling model.CheckReadonly or CheckReadonlyStatementInBox. As a result, when a workspace runs in read-only mode (--readonly=true), an authenticated administrator can submit arbitrary SQL through /api/search/fullTextSearchBlock and obtain raw read access to the blocks database, even though the dedicated /api/query/sql endpoint is blocked in that mode. Fixed in v3.8.2.

## Remediation

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